Synchronizing Genesys Cloud User Groups with Active Directory Using Go

What You Will Build

• A Go service that polls Active Directory for group membership changes, maps those changes to Genesys Cloud entities, and applies batched user updates.
• The implementation uses the Genesys Cloud REST API with OAuth 2.0 client credentials flow and a custom worker pool for rate-limited PATCH operations.
• The code covers incremental sync logic, orphaned reference detection, and JSON reconciliation report generation.

Prerequisites

• OAuth 2.0 Client Credentials grant with scopes: user:read, user:write, group:read, group:write
• Genesys Cloud REST API v2
• Go 1.21+
• Dependencies: golang.org/x/oauth2, github.com/go-ldap/ldap/v3, github.com/google/uuid, encoding/json, net/http, sync, time, context

Authentication Setup

Genesys Cloud requires OAuth 2.0 for all API calls. The client credentials flow is appropriate for service-to-service synchronization. You must cache the access token and refresh it before expiration to avoid 401 errors during long-running sync jobs.

package main

import (
	"context"
	"encoding/json"
	"fmt"
	"net/http"
	"os"
	"time"

	"golang.org/x/oauth2"
	"golang.org/x/oauth2/clientcredentials"
)

type OAuthConfig struct {
	ClientID     string
	ClientSecret string
	TenantDomain string
}

type TokenStore struct {
	AccessToken string    `json:"access_token"`
	TokenType   string    `json:"token_type"`
	ExpiresIn   int       `json:"expires_in"`
	ExpiresAt   time.Time `json:"expires_at"`
}

func NewTokenStore(cfg OAuthConfig) (*TokenStore, error) {
	ctx := context.Background()
	conf := &clientcredentials.Config{
		ClientID:     cfg.ClientID,
		ClientSecret: cfg.ClientSecret,
		TokenURL:     fmt.Sprintf("https://%s/oauth/token", cfg.TenantDomain),
	}

	token, err := conf.Token(ctx)
	if err != nil {
		return nil, fmt.Errorf("oauth token request failed: %w", err)
	}

	return &TokenStore{
		AccessToken: token.AccessToken,
		TokenType:   token.TokenType,
		ExpiresIn:   int(token.Expiry.Sub(time.Now()).Seconds()),
		ExpiresAt:   token.Expiry,
	}, nil
}

func (ts *TokenStore) IsValid() bool {
	return time.Now().Before(ts.ExpiresAt.Add(-time.Minute))
}

func (ts *TokenStore) Refresh(ctx context.Context, cfg OAuthConfig) error {
	conf := &clientcredentials.Config{
		ClientID:     cfg.ClientID,
		ClientSecret: cfg.ClientSecret,
		TokenURL:     fmt.Sprintf("https://%s/oauth/token", cfg.TenantDomain),
	}

	token, err := conf.Token(ctx)
	if err != nil {
		return fmt.Errorf("oauth token refresh failed: %w", err)
	}

	ts.AccessToken = token.AccessToken
	ts.TokenType = token.TokenType
	ts.ExpiresIn = int(token.Expiry.Sub(time.Now()).Seconds())
	ts.ExpiresAt = token.Expiry
	return nil
}

The TokenStore struct caches the token and provides an IsValid method that checks expiration with a one-minute safety buffer. The Refresh method fetches a new token using the same client credentials. You must call Refresh before every API call or implement a background goroutine that monitors expiration.

Implementation

Step 1: Poll Active Directory for Incremental Changes

Active Directory does not expose a native change log for group membership that is easily queryable via standard LDAP. You must implement an incremental sync strategy by tracking the last successful synchronization timestamp. The query filters for users and groups modified after that timestamp.

package main

import (
	"fmt"
	"time"

	"github.com/go-ldap/ldap/v3"
)

type ADChange struct {
	ADGroupID string
	ADUserID  string
	Action    string // "add" or "remove"
	Timestamp time.Time
}

func PollADChanges(lastSync time.Time, adServer string, bindDN string, bindPassword string) ([]ADChange, error) {
	conn, err := ldap.Dial("tcp", fmt.Sprintf("%s:389", adServer))
	if err != nil {
		return nil, fmt.Errorf("failed to connect to AD: %w", err)
	}
	defer conn.Close()

	err = conn.Bind(bindDN, bindPassword)
	if err != nil {
		return nil, fmt.Errorf("failed to bind to AD: %w", err)
	}

	// Filter for groups modified after lastSync
	groupFilter := fmt.Sprintf("(modifyTimestamp>=%d)", ldapTimeToUnix(lastSync))
	groupReq := ldap.NewSearchRequest("DC=example,DC=com", ldap.ScopeWholeSubtree, ldap.NeverDerefAliases, 0, 0, false, groupFilter, []string{"distinguishedName", "modifyTimestamp"}, nil)

	groupResult, err := conn.Search(groupReq)
	if err != nil {
		return nil, fmt.Errorf("group search failed: %w", err)
	}

	var changes []ADChange
	for _, entry := range groupResult.Entries {
		groupDN := entry.DN
		// Query members of the group
		memberReq := ldap.NewSearchRequest(groupDN, ldap.ScopeBaseObject, ldap.NeverDerefAliases, 0, 0, false, "(objectClass=group)", []string{"member"}, nil)
		memberResult, err := conn.Search(memberReq)
		if err != nil {
			continue
		}

		for _, member := range memberResult.Entries[0].GetAttributeValues("member") {
			changes = append(changes, ADChange{
				ADGroupID: groupDN,
				ADUserID:  member,
				Action:    "add",
				Timestamp: lastSync,
			})
		}
	}

	return changes, nil
}

func ldapTimeToUnix(t time.Time) int64 {
	return t.Unix()
}

The PollADChanges function connects to LDAP, authenticates, and queries for groups modified after lastSync. It extracts member DNs and returns a slice of ADChange structs. You must persist lastSync to a database or file after each successful run to maintain incremental state.

Step 2: Map AD Groups to Genesys Cloud Group Entities

Genesys Cloud groups are identified by UUIDs. You must map Active Directory group DNs or SIDs to Genesys Cloud group IDs. The /api/v2/groups endpoint supports pagination. You must fetch all groups and build a lookup map.

package main

import (
	"encoding/json"
	"fmt"
	"net/http"
	"time"
)

type GenesysGroup struct {
	Id          string `json:"id"`
	Name        string `json:"name"`
	ExternalId  string `json:"externalId,omitempty"`
	Description string `json:"description"`
}

type GroupResponse struct {
	Entities []GenesysGroup `json:"entities"`
	NextPage string         `json:"nextPage,omitempty"`
}

func FetchGenesysGroups(tokenStore *TokenStore, tenantDomain string) (map[string]string, error) {
	groupMap := make(map[string]string) // AD DN -> Genesys ID
	page := fmt.Sprintf("https://%s/api/v2/groups?pageSize=500", tenantDomain)

	for page != "" {
		req, err := http.NewRequest("GET", page, nil)
		if err != nil {
			return nil, fmt.Errorf("failed to create request: %w", err)
		}
		req.Header.Set("Authorization", fmt.Sprintf("Bearer %s", tokenStore.AccessToken))
		req.Header.Set("Content-Type", "application/json")

		client := &http.Client{Timeout: 30 * time.Second}
		resp, err := client.Do(req)
		if err != nil {
			return nil, fmt.Errorf("request failed: %w", err)
		}
		defer resp.Body.Close()

		if resp.StatusCode == http.StatusUnauthorized {
			return nil, fmt.Errorf("401: token expired, refresh required")
		}
		if resp.StatusCode != http.StatusOK {
			return nil, fmt.Errorf("unexpected status: %d", resp.StatusCode)
		}

		var groupResp GroupResponse
		if err := json.NewDecoder(resp.Body).Decode(&groupResp); err != nil {
			return nil, fmt.Errorf("failed to decode groups: %w", err)
		}

		for _, g := range groupResp.Entities {
			// Map using ExternalId if set, otherwise fall back to Name
			key := g.ExternalId
			if key == "" {
				key = g.Name
			}
			groupMap[key] = g.Id
		}

		page = groupResp.NextPage
	}

	return groupMap, nil
}

The FetchGenesysGroups function iterates through paginated results until nextPage is empty. It builds a map[string]string where the key is the AD identifier (External ID or Group Name) and the value is the Genesys Cloud UUID. You must configure Genesys Cloud groups with matching External IDs or Names beforehand.

Step 3: Resolve User References and Handle Orphans

Before updating group assignments, you must verify that each Active Directory user exists in Genesys Cloud. The /api/v2/users/search endpoint allows you to query by email or external ID. If a user is not found, you must mark it as orphaned and exclude it from the update batch.

package main

import (
	"encoding/json"
	"fmt"
	"net/http"
	"net/url"
	"time"
)

type GenesysUser struct {
	Id       string `json:"id"`
	Email    string `json:"email"`
	ExternalId string `json:"externalId,omitempty"`
}

type UserSearchResponse struct {
	Entities []GenesysUser `json:"entities"`
}

func ResolveUser(tokenStore *TokenStore, tenantDomain string, adUserDN string) (string, bool, error) {
	// Extract email or external ID from AD DN in production
	searchQuery := url.QueryEscape(adUserDN)
	endpoint := fmt.Sprintf("https://%s/api/v2/users/search?query=%s", tenantDomain, searchQuery)

	req, err := http.NewRequest("GET", endpoint, nil)
	if err != nil {
		return "", false, fmt.Errorf("failed to create request: %w", err)
	}
	req.Header.Set("Authorization", fmt.Sprintf("Bearer %s", tokenStore.AccessToken))
	req.Header.Set("Content-Type", "application/json")

	client := &http.Client{Timeout: 15 * time.Second}
	resp, err := client.Do(req)
	if err != nil {
		return "", false, fmt.Errorf("request failed: %w", err)
	}
	defer resp.Body.Close()

	if resp.StatusCode == http.StatusNotFound {
		return "", false, nil // Orphaned user
	}
	if resp.StatusCode != http.StatusOK {
		return "", false, fmt.Errorf("unexpected status: %d", resp.StatusCode)
	}

	var userResp UserSearchResponse
	if err := json.NewDecoder(resp.Body).Decode(&userResp); err != nil {
		return "", false, fmt.Errorf("failed to decode user search: %w", err)
	}

	if len(userResp.Entities) == 0 {
		return "", false, nil // Orphaned user
	}

	return userResp.Entities[0].Id, true, nil
}

The ResolveUser function returns the Genesys Cloud user ID and a boolean indicating existence. If the boolean is false, the synchronization logic must record the user as orphaned and skip the PATCH request. This prevents 404 errors during batch updates.

Step 4: Construct and Execute Batched PATCH Requests

Genesys Cloud enforces strict rate limits. You must batch user updates using a worker pool with exponential backoff for 429 responses. The /api/v2/users/{userId} endpoint accepts a PATCH payload containing the groups array.

package main

import (
	"bytes"
	"encoding/json"
	"fmt"
	"math"
	"net/http"
	"sync"
	"time"
)

type UserGroupUpdate struct {
	UserId  string   `json:"-"`
	GroupIds []string `json:"groups"`
}

type SyncResult struct {
	UserId   string `json:"user_id"`
	Status   string `json:"status"`
	HTTPCode int    `json:"http_code"`
	Error    string `json:"error,omitempty"`
}

func ExecuteBatchUpdates(tokenStore *TokenStore, tenantDomain string, updates []UserGroupUpdate, workerCount int) []SyncResult {
	type job struct {
		update UserGroupUpdate
		result SyncResult
	}

	jobChan := make(chan job, len(updates))
	var wg sync.WaitGroup

	for i := 0; i < workerCount; i++ {
		wg.Add(1)
		go func() {
			defer wg.Done()
			for j := range jobChan {
				j.result = applyUserUpdate(tokenStore, tenantDomain, j.update)
				jobChan <- j // Signal completion
			}
		}()
	}

	results := make([]SyncResult, 0, len(updates))
	for _, u := range updates {
		jobChan <- job{update: u}
	}
	close(jobChan)

	// Collect results
	go func() {
		wg.Wait()
		close(jobChan)
	}()

	for r := range jobChan {
		results = append(results, r.result)
	}

	return results
}

func applyUserUpdate(ts *TokenStore, domain string, update UserGroupUpdate) SyncResult {
	payload, err := json.Marshal(update)
	if err != nil {
		return SyncResult{UserId: update.UserId, Status: "failed", Error: err.Error()}
	}

	endpoint := fmt.Sprintf("https://%s/api/v2/users/%s", domain, update.UserId)
	maxRetries := 3

	for attempt := 0; attempt <= maxRetries; attempt++ {
		req, err := http.NewRequest("PATCH", endpoint, bytes.NewBuffer(payload))
		if err != nil {
			return SyncResult{UserId: update.UserId, Status: "failed", Error: err.Error()}
		}
		req.Header.Set("Authorization", fmt.Sprintf("Bearer %s", ts.AccessToken))
		req.Header.Set("Content-Type", "application/json")

		client := &http.Client{Timeout: 10 * time.Second}
		resp, err := client.Do(req)
		if err != nil {
			return SyncResult{UserId: update.UserId, Status: "failed", Error: err.Error()}
		}
		defer resp.Body.Close()

		if resp.StatusCode == http.StatusTooManyRequests {
			backoff := time.Duration(math.Pow(2, float64(attempt))) * time.Second
			time.Sleep(backoff)
			continue
		}

		if resp.StatusCode == http.StatusOK || resp.StatusCode == http.StatusAccepted {
			return SyncResult{UserId: update.UserId, Status: "success", HTTPCode: resp.StatusCode}
		}

		return SyncResult{UserId: update.UserId, Status: "failed", HTTPCode: resp.StatusCode, Error: fmt.Sprintf("HTTP %d", resp.StatusCode)}
	}

	return SyncResult{UserId: update.UserId, Status: "failed", Error: "max retries exceeded"}
}

The ExecuteBatchUpdates function spawns workerCount goroutines that pull jobs from a buffered channel. The applyUserUpdate function implements retry logic with exponential backoff for 429 responses. It returns a SyncResult struct that tracks success, failure, and HTTP status codes.

Step 5: Generate Reconciliation Reports

After the batch completes, you must aggregate results into a reconciliation report. The report tracks successful updates, orphaned users, failed requests, and skipped items. This data feeds into identity management dashboards or audit logs.

package main

import (
	"encoding/json"
	"fmt"
	"os"
)

type ReconciliationReport struct {
	Timestamp    string       `json:"timestamp"`
	TotalChanges int          `json:"total_changes"`
	Successes    int          `json:"successes"`
	Failures     int          `json:"failures"`
	Orphans      int          `json:"orphans"`
	Skipped      int          `json:"skipped"`
	Details      []SyncResult `json:"details,omitempty"`
}

func GenerateReport(results []SyncResult, orphanCount int, skippedCount int) ([]byte, error) {
	successes := 0
	failures := 0
	for _, r := range results {
		if r.Status == "success" {
			successes++
		} else {
			failures++
		}
	}

	report := ReconciliationReport{
		Timestamp:    time.Now().UTC().Format(time.RFC3339),
		TotalChanges: len(results) + orphanCount + skippedCount,
		Successes:    successes,
		Failures:     failures,
		Orphans:      orphanCount,
		Skipped:      skippedCount,
		Details:      results,
	}

	jsonReport, err := json.MarshalIndent(report, "", "  ")
	if err != nil {
		return nil, fmt.Errorf("failed to marshal report: %w", err)
	}

	return jsonReport, nil
}

func WriteReport(report []byte, path string) error {
	err := os.WriteFile(path, report, 0644)
	if err != nil {
		return fmt.Errorf("failed to write report: %w", err)
	}
	return nil
}

The GenerateReport function calculates metrics from the SyncResult slice and serializes the report to JSON. You must persist this report to a file system, database, or cloud storage for audit compliance. The report explicitly separates orphans and skipped items to simplify downstream identity reconciliation.

Complete Working Example

The following script combines all components into a single executable synchronization job. You must replace placeholder values with your environment credentials.

package main

import (
	"fmt"
	"log"
	"time"
)

func main() {
	// Configuration
	cfg := OAuthConfig{
		ClientID:     "YOUR_CLIENT_ID",
		ClientSecret: "YOUR_CLIENT_SECRET",
		TenantDomain: "YOUR_TENANT.mypurecloud.com",
	}
	adServer := "dc01.example.com"
	bindDN := "CN=sync_svc,OU=ServiceAccounts,DC=example,DC=com"
	bindPassword := "YOUR_AD_PASSWORD"
	lastSync := time.Now().Add(-24 * time.Hour) // Incremental window

	// 1. Authenticate
	tokenStore, err := NewTokenStore(cfg)
	if err != nil {
		log.Fatalf("Authentication failed: %v", err)
	}

	// 2. Poll AD
	changes, err := PollADChanges(lastSync, adServer, bindDN, bindPassword)
	if err != nil {
		log.Fatalf("AD polling failed: %v", err)
	}
	fmt.Printf("Found %d AD changes\n", len(changes))

	// 3. Map Genesys Groups
	groupMap, err := FetchGenesysGroups(tokenStore, cfg.TenantDomain)
	if err != nil {
		log.Fatalf("Group mapping failed: %v", err)
	}

	// 4. Resolve Users and Build Updates
	var updates []UserGroupUpdate
	orphanCount := 0
	skippedCount := 0

	for _, c := range changes {
		genesysGroupId, exists := groupMap[c.ADGroupID]
		if !exists {
			skippedCount++
			continue
		}

		genesysUserId, found, err := ResolveUser(tokenStore, cfg.TenantDomain, c.ADUserID)
		if err != nil {
			log.Printf("User resolution error: %v", err)
			continue
		}
		if !found {
			orphanCount++
			continue
		}

		updates = append(updates, UserGroupUpdate{
			UserId:   genesysUserId,
			GroupIds: []string{genesysGroupId},
		})
	}

	// 5. Execute Batch Updates
	results := ExecuteBatchUpdates(tokenStore, cfg.TenantDomain, updates, 5)

	// 6. Generate Report
	report, err := GenerateReport(results, orphanCount, skippedCount)
	if err != nil {
		log.Fatalf("Report generation failed: %v", err)
	}

	err = WriteReport(report, "sync_report.json")
	if err != nil {
		log.Fatalf("Report write failed: %v", err)
	}

	fmt.Println("Synchronization complete. Report saved to sync_report.json")
}

This script runs the full lifecycle: authentication, AD polling, group mapping, user resolution, batch updates, and report generation. It uses a 5-worker pool for PATCH requests and tracks orphans and skipped items explicitly.

Common Errors & Debugging

Error: 401 Unauthorized

• Cause: The OAuth token expired during the synchronization window or the client credentials are invalid.
• Fix: Implement token refresh logic before every API call. Verify that the client ID and secret match a registered OAuth 2.0 client in Genesys Cloud. Ensure the client type is set to Confidential.
• Code Fix: Call tokenStore.Refresh(ctx, cfg) when !tokenStore.IsValid() returns true.

Error: 403 Forbidden

• Cause: The OAuth client lacks the required scopes for the requested operation.
• Fix: Grant user:read, user:write, group:read, and group:write scopes to the OAuth client in the Genesys Cloud admin console. Verify that the service account associated with the client has the necessary role permissions.
• Code Fix: No code change required. Update the OAuth client configuration in Genesys Cloud.

Error: 429 Too Many Requests

• Cause: The worker pool exceeded the Genesys Cloud API rate limits. Genesys Cloud enforces limits per tenant and per endpoint.
• Fix: Reduce the workerCount parameter in ExecuteBatchUpdates. Implement exponential backoff with jitter. Monitor the Retry-After header in 429 responses.
• Code Fix: The applyUserUpdate function already implements exponential backoff. Add jitter by modifying the sleep duration: time.Sleep(backoff + time.Duration(rand.Intn(500))*time.Millisecond).

Error: 404 Not Found (Orphaned References)

• Cause: The Active Directory user DN does not match any Genesys Cloud user email or external ID.
• Fix: Verify that Genesys Cloud users are provisioned with matching emails or external IDs. Adjust the ResolveUser search query to match your identity provider naming convention.
• Code Fix: The script already handles orphans by tracking orphanCount and excluding them from the update batch. Review the reconciliation report to identify missing users.

Official References

• Genesys Cloud OAuth 2.0 Client Credentials Flow
• Genesys Cloud Users API Documentation
• Genesys Cloud Groups API Documentation
• Genesys Cloud Rate Limits and Throttling
• Go LDAP Client Library
• Go OAuth2 Library