Microsoft's Exchange Properties Limits Addition - MC884017

OVERVIEW

Microsoft is changing the allowed size and count of values for various Exchange properties. 

APPLIES TO

• Microsoft Exchange Properties

• Microsoft Office 365 application

• Okta Identity Engine

• Okta Classic

CAUSE

Microsoft is changing the allowed size and count of values for various Exchange properties. Customers will face errors while updating the properties that exceed the size mentioned below, leading to disruption in service. Here are the definitions of the limits:

• Max length: Size of each value

• Max Count: Total count of values

The changes will be applied in two phases, between late September 2024 and late November 2024. Please be aware that Microsoft has not provided a definitive date for either phase. 

Phase1: Starting late September 2024, Microsoft will be adding limits to the following properties:

Phase 2: Starting late November 2024, Microsoft will be adding limits to the following properties:

SOLUTION AND WHAT TO EXPECT

Starting in late September, Microsoft will begin enforcing size limit validations. As a result, customers may encounter error messages or provisioning failures on the Okta side. To resolve these issues, customers must ensure that the attributes mentioned above do not exceed the specified limits.

Here is a sample error message that Okta administrators might see in Okta’s Microsoft Office 365 application:

“errorCode=ExceededAllowedLength; errorDescription=Unable to update this object in Azure Active Directory because the attribute [MSExchArchiveName] in the local Directory exceeds the maximum allowed length. To resolve this, reduce the length of the attribute in the local directory services and try again.”

Please be aware that if multiple attributes exceed the size limit, Microsoft will only send an error message for one attribute, not all. Therefore, Okta strongly advises our customers to ensure that the attributes listed above do not exceed the specified limits.