Self-Managed

General

• Choosing a GIPHY API Key in Mattermost: Your Own Key or the Built-in Default
• Cannot Pin or Unpin Messages Older Than the Post Edit Time Limit After Upgrading to v11.7.0
• Microsoft Entra ID OIDC Authentication Requires a Client Secret; Managed Identity Not Supported
• How to Migrate or Upgrade a PostgreSQL Database to a New Host or Version
• Mattermost Upgrade Fails in staging environment due to Database Ownership and Migration Errors
• Mattermost 11.x Upgrade Error: Hidden Archived Channels
• See all 34 articles

CLI & MMCTL

• mmctl Fails With a Credentials Error, and Deactivated AD/LDAP Users Keep Reactivating
• Troubleshooting: Migrating a User from GitLab OAuth to SAML in Mattermost
• Troubleshooting Guide: Delays in Managing Personal Access Tokens in Mattermost
• Delete old archived channels
• Locked Out of System Administrator Account

Licensing

• Eligibility for Mattermost Staging/Testing Licenses
• How to Resolve the "Invalid Signature" Error in Mattermost when requesting a Trial License
• Updating a Mattermost Enterprise License

Infrastructure and Monitoring

• Playbooks "Add Channel to Sidebar Category" Action Fails After MySQL to PostgreSQL Migration
• Configure Read/Write Splitting for Mattermost with a Patroni-Managed PostgreSQL Cluster
• Why Using DataSourceReplicas Is Recommended: Node-Role vs SQL-Aware Proxies
• MaxOpenConns multiplies across data sources and HA nodes, causing connection exhaustion
• Elasticsearch/OpenSearch ClientKey Path Overwritten with Masked Value on Config Save (v10.11.15-v10.11.17)
• Mattermost Fails to Start After apt Upgrade: Port 443 Permission Denied
• See all 35 articles

SAML Integration

• SAML SSO with Entra ID: Resolving Signature Verification Errors
• Solving "Duplicate Username" SAML Login Warning in Mattermost

AD and LDAP Integration

• LDAP User Remains Deactivated After Returning - AuthData Mismatch on IdAttribute Change
• Understanding LDAP `objectGUID` Encoding in Mattermost
• LDAP Configuration Troubleshooting in Mattermost (Bind & Sync)
• Resolving “An account with that email already exists” During SAML Login in LDAP-Integrated Deployments
• Using ldapsearch
• LDAP Deactivates Users Unexpectedly
• See all 8 articles

Plugins

• AI Services List Is Empty After Upgrading from Mattermost Agents v1 to v2
• Mattermost Agents v2: OpenAI compatible AI Service Fails with "No Valid Keys" Error Due to Missing API Key
• GitLab Plugin v1.12 Upgrade Leaves Existing Instances Without Migrated OAuth Configuration
• Calls Recording Fails With "failed to initialize job service" After Reboot
• MS Teams Meetings Plugin Fails After Upgrading to Mattermost 10.11.6
• Auto Translate Plugin Error: AWS Region Must Be Lowercase
• See all 10 articles