Add the ExcludeSCPLookup registry key when configuring Outlook 2013 or 2016. Migrating from on prem Exchange to Office 365
Registry Key: HKEY_CURRENT_USER\Software\Microsoft\Office\15.0\Outlook\AutoDiscover
Right click on right hand panel, New - DWORD (32 bit) Value - ExcludeSCPLookup, change value data to 1
Ещё видео!