Change the limit for the number of nested embedded messages

By default, the limit is 50 embedded messages when an e-mail message is converted from MIME to MAPI. The number can be set to any positive integer. This helps prevent scenarios in which Outlook hangs while attempting conversion.

Supported on: At least Windows 7


Registry HiveHKEY_CURRENT_USER
Registry Pathsoftware\policies\microsoft\office\15.0\outlook\options\mail
Value Nameembeddedmessagelimit
Value TypeREG_DWORD
Default Value50
Min Value
Max Value99999

outlk15.admx

Administrative Templates (Computers)

Administrative Templates (Users)