hi.. The captain of our guild has not been active for 3 months now.... Is it possible to appoint a new captain?
Unfortunately not... you (and your guild-mates) will have to decide between: remaining with an MIA leader; joining a more active guild (there are plenty); or creating a fresh identity (new guild) with leader(s) picked from your existing group. Whichever you choose - good luck!
If you like your guild name just create a new guild with the same name. Because the Captain has been inactive for more than 10 days your current guild won’t come up in any searches.
Actually there is something you can do. Send a message to midoki, explaining who you are, your guild and your situation. They will sort it for you. This happened to me in my guild and midoki sorted it by simply making me captain! Good luck!