Policy
Change the limit for the number of characters in Friendly Name
By default, the limit is 1000 characters for Friendly Name 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.
Pack Microsoft Office
Category Microsoft Outlook 2016 / MIME to MAPI Conversion
Policy ID
cf141df0d955 Internal name
L_ChangethelimitFriendlyName Registry
Copy registry mappings
HKCU\software\policies\microsoft\office\16.0\outlook\options\mail\friendlynamelimitPolicy notes
By default, the limit is 1000 characters for Friendly Name 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.