We have a software as a service product with 100 customers who all must use QBO to automate billing.

We have historically turned off custom transaction numbers to allow for the invoices to be auto numbered

It seems you are forcing people onto the new format, which defaults the settings back to "custom transaction numbers" turned ON.   I have gone in and reset them both in Account Settings and in Custom Form Styles- and quite often it even reverts back again!  this is causing my customers a ton of anxt (and of course my support staff).   Please please help tell me how to let people use the OLD FORMAT and keep custom transaction numbers OFF for good