This is a really simple fix, this can occur if certain roles were missing from on-premise or were disabled in the past. Step 1:Go to Exchange Online Admin Centerhttps://admin.exchange.microsoft.com/ Step 2:Go to Roles > User RolesSelect “Default Role Assignment Policy“Click ...
Outlook 365 – Disable or Hide: Share to Teams and Send to OneNote in Outlook 365 Apps for Enterprise
Run the following commands in PowerShell. Connect to Exchange OnlineConnect-ExchangeOnline Disable Share to Teams Disable Share to OneNote ...