You can configure the file name separator from dash to dot for new parts under Customer Defaults --> Teamcenter Integration --> General --> File New --> File Name Separator; however, when performing a Save-As operation with Non-Masters, the master was modified to dot but not the specification drawing. Why would that be?
Solution You need to edit the preference in Teamcenter:
Notes and References IR9199869
Hardware/Software Configuration Platform: all
OS Version: n/a