3 ms·
If the OP insists on not going down the O365 route (which will probably come with the same lack of guaranteed storage in the UK, which I believe is Brexit relat
by oarsinsync 6y ago
If the OP insists on not going down the O365 route (which will probably come with the same lack of guaranteed storage in the UK, which I believe is Brexit related as Google migrated my data out of the EU this year as well), the best recommendations I've seen as far as interop support actually goes is OnlyOffice combined with NextCloud.
I haven't used it myself, but a number of people on this forum have advised that it's got significantly better compatibility with MS Office than any of the other contenders.
This may have been in word processing only, however, and as the GP notes, spreadsheets and presentations add their own headaches.