General - Sprint 165 Update
Features
Disable Request Access policy
Administrators can now turn off the Request Access feature in Azure DevOps. With Request Access, users are able to request access to a resource if they do not have access to an Organization in their tenant or to a Project within an Organization. The request resulted in an email notification to the administrators asking them to review and provide access as needed.
This new policy can be found under Organization Settings -> User policies.

When they turn off the Request Access feature, administrators will be prompted to provide a URL to their internal documentation with details to the process required for users to gain access to the associated Organization.

Next steps
Note
These features will roll out over the next two to three weeks.
Head over to Azure DevOps and take a look.
How to provide feedback
We would love to hear what you think about these features. Use the help menu to report a problem or provide a suggestion.

You can also get advice and your questions answered by the community on Stack Overflow.
Thanks,
Gopinath Chigakkagari (Twitter)