I have a question regarding the most commadlest that help you analyze of discover an issue with matters affecting office 365.
For instance in one issue with client email disappearing. We run get-retentionpolicy to find out the reason for disappearing emails was the retention policy was set to 60 days.
Please share if you have any similar commands that help you find out the issue with any office 365 application. In my job, I do cloud support, I am not a powershell expert but I got the basics, knowing userfull commands that shows the issue will make it easier instead of escalating to Microsoft for such simple cases.
I recommend for you to start to learn the very basics of Powershell. You can use Get-Command to list all cmdlets. Of course you can limit the output with the parameter -Module to the cmdlets of the module of interest.