Reply To: Find/Change only on Master Page?

> We’ve tried doing a find/replace on that whole header with the idea being that I can just change the ## and the 2016 and leave everything else the same

Do two GREP replacements:

Find what: (?<=##:\x{0018}~=\x{0018}, )2016
Change to: 2017 (or whichever year)

Find what: ##(?=:\x{0018})
Change to: whatever you want in place of ##

By specifying the page variables (\x{0018}) in a lookbehind (the first replacemend) and a lookahead (the second one) you use them to find text, but the variables are not involved in the change.

Peter