MS forcing reactivation and wrongly deactivating previously FULLY PURCHASED and activated desktop versions for our law firm

Our law firm has fully purchased MS products (for BUSINESS, which costs more than a personal MS product). We have spent a good deal of funds on these licenses with one per each desktop and user. However, starting in mid 2026, some of these FULLY PURCHASED and FULLY ACTIVATED products have regularly cut out and forced us to continually “reactivate” our license. On some desktops we are now seeing the save and print features greyed out. We have the licenses and some (not all) of these products starting working again once we reactivate, however, this is a frustrating and unwarranted disruption to our business.

We have done nothing different on our end - no desktop changes, no switching devices, operating systems, etc. In both Word and Excel (products we use daily) We’re prompted to “activate” a MS license (even though we already have activated our license). In MS Word, this nuisance takes a minute and we’re able to resume activity. In MS Excel, this is halting our entire business as the “activation” of our existing product generates an error code with no apparent way to resolve.

QUESTION: how do we permanently stop MS from forcing again and again re-activation of our desktop software (MS Offic for Mac)? and how do we get past the “error” for our Excel spreadsheets which has rendered previously useable software unusable?

NOTE TO MS POLICY MAKERS: Both generally and specific to MS Office, we along with probably millions of other businesses do not like and do not wish to support the forced subscription model. If your product greatly improves and can justify an increased cost to purchase a new version, we’d purchase it. But generally MS Office does not change significantly year to year and we simply do not have the interest or funds to constantly pay to subscribe to or “rent" a word processor. In fact, if we had to choose between a forced subscription to MS Office and a free word processor (of which there are many, google and otherwise), we’d definitely choose the free option. We don’t at all mind paying a fair price for a software purchase, but the rent-model is distasteful at best.