GPO tool

Group Policy made searchable

A free ADMX browser or comparison tool for IT administrators.Search policies, find registry keys, and see exactly what each setting writes to the Windows Registry. Or compare two GPO backups to see exactly what has changed between them.

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Change the limit for the number of MIME headers

By default, the limit is 20000 for the number of MIME headers 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.

Registry Information

VendorMicrosoft
ProductMicrosoft Outlook 2016
CategoryMicrosoft Outlook 2016 › MIME to MAPI Conversion
Applies toUser Configuration
Supported onWindows7
Registry Key[HKCU]softwarepoliciesmicrosoftoffice16.0outlookoptionsmail

Policy Settings

L_empty74

Registry Key[HKCU]softwarepoliciesmicrosoftoffice16.0outlookoptionsmail
Value Namemimeheaders
TypeREG_DWORD
Max value99999
Default20000