Edit UDA in Central Administration
Right now after promoting a UDA to farm level, it is not possible to edit it in Central Administration.
Michael Niermann commented
1. Export as .uda
2. Import .nwf of UDA in new UDA, modify and export .nwf
3. Delete at farm level
4. Import .uda at site level and import modified .nwf
If you don't have .nwf of UDA: Import UDA at site level and export .nwf
Seems a bit complicated though...
Have been put off promoting anymore UDA's to farm level due to this limitation. But having duplicate site collection scoped UDA's is inefficient.
Andreas Schwamü commented
would make things easier!
This is really important for us. To me it defeats the purpose of being able to have a farm level UDA if it cannot be updated.