Is there a legitimate way to obtain exchange2016-kb5121576-x64-en.exe? It appears to be available only through Extended Security Updates, and I'm trying to determine how to acquire the update safely rather than downloading it from an unknown source.
3 Answers
I wouldn’t download an Exchange update from an untrusted link. The safer options are to purchase the appropriate Extended Security Updates entitlement or move to a supported Exchange version. If you do obtain the installer elsewhere, verify its cryptographic hash against the value published by Microsoft before running it.
The main issue may be figuring out how to enroll in the Extended Security Updates program and obtain the entitlement through Microsoft or a licensing partner. I’d contact Microsoft licensing support or your reseller rather than relying on a shared executable.
Be very cautious with anyone offering the installer while telling you to disable antivirus. That’s a major red flag. Keep security tools enabled, verify the file signature and hash, and use an official update path whenever possible.
Microsoft’s published hashes can help confirm that a file hasn’t been altered, but they don’t make an unofficial download source trustworthy. Upgrading or obtaining the update through the official licensing channel is still the better approach.