If you open Deployment Manager and click to download agent updates from the support portal, it appears to work but the updates don't appear in DM.
Problem: After opening Deployment Manager and attempting to download the agent updates by selecting to download from the support portal, it appears the download works, however, when you check for the downloaded files, either no files exist or the older versions of the files are still in place.
Cause: Deployment Manager makes use of TLS 1.0 but the operating system is using TLS 1.2.
Resolution: A registry setting must be added into the Windows system to allow it to recognize TLS 1.0. The registry setting is as follows:
1) Open regedit to location and navigate to: HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\.NETFramework\v4.0.30319
2) Create a new DWord key named: SchUseStrongCrypto Set the data to 1
After making this change, you should be able to download the agent updates normally.