I think there is more to it: IT desktop admins mostly trained on the microsoft ecosystem, GPOs, etc.
Compliance checkboxes. That is the true strength of Microsoft - in 365 you are pretty much compliant with everything out of the box or you at least get the tools and reports to achieve compliance, and even the stuff where compliance is questionable (i.e. GDPR), no one will bother you as an individual company too much because any court would throw that charge out for being unreasonable.
"No one ever got fired for buying IBM" is just as valid today, it's just Microsoft. If you are a large company, there is virtually no alternative than the unholy triumvirate of Microsoft (Azure, AD, O365), SAP and Oracle (Java + DB) - deviating from that means lots of paperwork.
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Compliance checkboxes. That is the true strength of Microsoft - in 365 you are pretty much compliant with everything out of the box or you at least get the tools and reports to achieve compliance, and even the stuff where compliance is questionable (i.e. GDPR), no one will bother you as an individual company too much because any court would throw that charge out for being unreasonable.
"No one ever got fired for buying IBM" is just as valid today, it's just Microsoft. If you are a large company, there is virtually no alternative than the unholy triumvirate of Microsoft (Azure, AD, O365), SAP and Oracle (Java + DB) - deviating from that means lots of paperwork.