SCCM: What NOT to do when upgrade SCCM CB

Gerry published a piece of wisdom from Prod Team:

 

1. Do NOT manually clean up EasySetupPayload folder for CM update that is being downloaded/processed.
2. Do NOT manually clean up CMU without confirming the correct state and content library for the Easy Setup package.
3. Do NOT restore the CM database/CM site server if there is an error with CM update (fix the issue and “retry installation”).
4. Do NOT reinstall the Service Connection Point if an update is in progress.
5. Do NOT use 1602 cd.latest to install a standalone primary site (Note: you can use this method to install a child primary to a 1602 CAS).
6. Do NOT use 1602 cd.latest to upgrade a 1511 site or R2 SP1 (or earlier) site.
7. Do NOT manually clean up any CM_Update* tables.
8. Do NOT restart CMU service during installation.
9. Do NOT keep the CMUStaging\<Guid> folder open during installation.
10. Do NOT copy files in CMUStaging.
11. Do NOT restart SMSEXEC during payload download (dmpdownloader.log shows if the package content is downloading). The Notification can get lost in that scenario.

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