This morning when trying to install the PowerShell Module for Exchange Online from the ECP,
I came accross this error message
Even though this is not a very serious issue, it may cause you lose your time.
So to avoid this error message, use INTERNET EXPLORER to connect to the ECP and then the INSTALLATION WILL BE POSSIBLE.
Thank you.
Jean-Marie AGBO
agbo.blog 
Try opening Exchange Admin Center in Internet Explorer. it will not work in any other browser.
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Microsoft went crazy on this one.. I did every thing to install this and it’s just impossible, how hard was to release a god dammned .EXE to install this module??
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