Change the limit for the number of MIME headers
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Policy overview

Key metadata and intent for this policy.

User
Category
Microsoft Outlook 2016 > MIME to MAPI Conversion
Supported on
Windows7

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.

Internal name
L_ChangethelimitMIMEheaders
Policy ID
c618db444fbd
Elements
1

Registry values

How enabled and disabled states update the registry.

No explicit registry values are set for enabled or disabled states.

Policy elements

Inputs and configuration options exposed by this policy.

ScopeElementTypeRegistry mappingConstraints & behaviorCopy
User
L_empty74
ID L_empty74
decimal
Path
software\policies\microsoft\office\16.0\outlook\options\mail
Value name
mimeheaders
Type
REG_DWORD
Range: ? to 99999
L_empty74
User · Type decimal
Registry mapping
Path
software\policies\microsoft\office\16.0\outlook\options\mail
Value name
mimeheaders
Type
REG_DWORD
Details
Range: ? to 99999