Third-party email clients would work if not blocked for employers configuration.

Teams works on Linux and i think OneDrive is technically webdav. I avoid mixing Microsoft and Linux, but i believe the modern (web) applications should work everywhere.

Not sure about the devs, but Salesforce’s sales force is in it. Shove Salesforce into any company (usually through incompetent employees on the buyer side), recommend motivated Junior consultants to set it up. Then require more consultants and more senior consultants to operate and fix it. Until everyone hates Salesforce.