Only one week ago VMware released Unified Access Gateway (UAG) 3.9.
The new version addresses some bugs of its previous version.

The full release notes are here

Before you upgrade your UAGs visit the InteropMatrix to check if your installation is supported to work with UAG 3.9.1
VMware Product Interoperability Matrices

What is New in This Release

VMware Unified Access Gateway 3.9.1 includes bug fixes, which is documented in the Resolved Issues section.

Resolved Issues

  • After uploading files to the VMware Content Locker application, files are saved with the .smbconnector extension. Such files cannot be viewed on the network server. 
    As part of the fix, you must configure certain custom settings on the Content Gateway configuration page in the Workspace ONE UEM Console.
    For more details about the fix, see the
  • Optimized behavior of tunnel service when performing device whitelist sync for large deployments.