Sign in with Microsoft
Sign in or create an account.
Select a different account.
You have multiple accounts
Choose the account you want to sign in with.


In some scenarios, you should follow FIPS (Federal Information Processing Standards) to encrypt the data. If FIPS enforcement is enabled, data can be encrypted by using only FIPS compliant implementations. When you enable mailbox audit logging in Microsoft Exchange Server 2019 or Exchange Server 2016, the SHA1Managed implementation will be used to encrypt the data. Therefore, mailbox auditing fails, and you receive the following error message:

System.InvalidOperationException: This implementation is not part of the Windows Platform FIPS validated cryptographic algorithms.


To fix this issue, install one of the following updates:


Learn about the  terminology that Microsoft uses to describe software updates.

Need more help?

Want more options?

Explore subscription benefits, browse training courses, learn how to secure your device, and more.

Communities help you ask and answer questions, give feedback, and hear from experts with rich knowledge.

Was this information helpful?

What affected your experience?
By pressing submit, your feedback will be used to improve Microsoft products and services. Your IT admin will be able to collect this data. Privacy Statement.

Thank you for your feedback!