Issue
SCCM 2107 upgrade package stuck in Downloading state
Errors in dmpdownloader.log
SMS_DMP_DOWNLOADER 15060 (0x3ad4) Error in verifying the trust of file 'E:\Program Files\Microsoft Configuration Manager\EasySetupPayload\42e1cf6e-95a1-4a8d-96ad-311e6247b3fb.cab'.
SMS_DMP_DOWNLOADER 15060 (0x3ad4) WARNING: Failed to call IsFileTrusted~~
What I observed is that 42e1cf6e-95a1-4a8d-96ad-311e6247b3fb.cab was downloaded but its size is actually smaller than its true size. This led to the hash verification failure as seen in the log above.
Solution
Enable those address internet access for service connection point – Internet access requirements – Configuration Manager | Microsoft Docs
SCCM Monde 