Do you have an "IT guy" who knows how to manage systems? Perhaps I'm assuming a lot from your one sentence but it sounds to me like you are a bunch of techies who decided they can do their own IT and now realise you cant.
I work at a large corporation, my email (outlook, which we also use to book resources and rooms), password management, desk phone, software updates, identify and privileges are all tied together with a Microsoft stack (I don't pretend to know how it works). Do you need this? If so, is there a Linux equivalent to this holistic management? Do you need full MS Office (eg macros)? Are you happy with the variable compatibility that LibreOffice/online suites offer?
I work at a large corporation, my email (outlook, which we also use to book resources and rooms), password management, desk phone, software updates, identify and privileges are all tied together with a Microsoft stack (I don't pretend to know how it works). Do you need this? If so, is there a Linux equivalent to this holistic management? Do you need full MS Office (eg macros)? Are you happy with the variable compatibility that LibreOffice/online suites offer?