Exchange Properties Limits addition

Originally posted by Microsoft Sep 6, 2024 Uncategorized 0 Comments

Exchange is updating property size and count limits, effective in two phases from late September to late November 2024. Organizations must adhere to these new limits and prepare accordingly. Phase 1 includes limits for properties like CloudMSExchUCVoiceMailSettings, while Phase 2 includes CloudMSRtcPolicyAssignments, among others.

We’re making some changes to allowed size and count of values for various Exchange properties, here are the definition of the limits:

• Max length: Size of each value
• Max Count: Total count of values

When this will happen:

Changes will be applied in two phases between late September 2024 and late November 2024

How this affects your organization:

When this change takes effect, you will not be able to exceed the allowed limits

Starting late September 2024, we’re adding the following limits to these properties: 

Phase1: 

Property	Max Length	Max Count
CloudMSExchUCVoiceMailSettings	1123	20
MSExchArchiveName	512	20
MSExchResourceMetadata	1024	20
MSExchSenderHintTranslations	500	20
ExchangeResources	1024	20

Starting late November 2024, we’ll be adding limits to the following properties:

Phase 2: 

What you can do to prepare:

Review the new limits and take action as appropriate for your organization.

Property	Max Length	Max Count
CloudMSRtcPolicyAssignments	128	45
MSExchResourceSearchProperties	1024	35
CloudMSExchUserHoldPolicies	40	1150
MSExchExtensionCustomAttribute1	2048	750
MSExchExtensionCustomAttribute2	2048	750
MSExchExtensionCustomAttribute3	2048	400
MSExchExtensionCustomAttribute4	2048	400
MSExchExtensionCustomAttribute5	2048	250
ValidationError	948000	10
ProxyAddresses	1123	1200

Message ID: MC884017