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📝Fixing OWA Login Failures After Mailbox Migration from Exchange Online to On-Prem (SDServerErr;System.ArgumentException)
After migrating a mailbox from Exchange Online back to on-prem, OWA login may fail with SDServerErr and System.ArgumentException. Here’s how to fix it using MFCMAPI – and how to prevent it with PowerShell.
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📝Cloud Archive Not Available in OWA for On-Prem Exchange Users – Federation Trust Required
Can’t open cloud archive in OWA, but it works in Outlook? In hybrid Exchange setups, this may be due to missing Federation Trust. Here’s how to check and fix it.
EWS Free Area 