All articles · Page 9
Properly follow up on the July 2026 Exchange security updates
Two cleanup tasks are needed after installation: safely remove the old CVE-2026-42897 mitigation and review overprivileged legacy groups in Active Directory.
Access Exchange Online with PowerShell: Replace EWS with Microsoft Graph
Microsoft has been gradually retiring EWS in Exchange Online since October 2026, with full deactivation in April 2027. Learn how to register an app, authenticate a PowerShell script with a certificate, restrict access to individual mailboxes, and process messages and attachments through Microsoft Graph.
Back up and restore the HIN Mailgateway after an outage
A cluster protects the HIN Mailgateway against node failures, but it does not replace a backup. Configuration, key material, restore order, and the changes introduced by Stargate are critical.
Totemomail license limit reached: clean up orphaned users via LDAP
Disabled AD accounts remain in totemomail and continue to consume licenses. With a tested LDAPS connection and the cleanup agent, Active Directory becomes the authoritative source.
HIN Mailgateway 15.0.5: Fixing login failures after a cluster update
After updating an HIN Mailgateway cluster to version 15.0.5, logins fail on both nodes after a few minutes. This procedure restores the appliances to operation in a controlled manner.
Understanding Mail Routing Between TotemoMail and Exchange Online
How TotemoMail stores and processes messages, how the underlying Apache James switches between processors, and what matters for a secure mail loop with Exchange Online.
