Just finished legendary campaign co op, didn’t get final achievements but friend did. When I go to achievements on Xbox it says 100% but yet still locked. Anyone know what to do??
Are yours saying “Done! Unlocking…”? Because that’s what all of mine are doing, and I just went thru all the troubleshooting with xbox support and they believe it’s an issue of my profile not syncing properly with 343’s servers. So all they told me to do was get into contact with 343. However, 343 has no customer support, no phone number, no email. So I’ve been stuck posting on various forums and tweeting at various 343 employees. No luck so far.
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> Are yours saying “Done! Unlocking…”? Because that’s what all of mine are doing, and I just went thru all the troubleshooting with xbox support and they believe it’s an issue of my profile not syncing properly with 343’s servers. So all they told me to do was get into contact with 343. However, 343 has no customer support, no phone number, no email. So I’ve been stuck posting on various forums and tweeting at various 343 employees. No luck so far.
Mine just say 100% but locked really annoying took me a LOT of time to complete legendary campaign
I have the same problem (finished legendary a few hours ago). It says 100%. Hoping it will pop up eventually.
I have the same issue, I just finished camping on legendary and 3 archivements I was supposed to get I didn’t. I guess I won’t get the lone wolf… 
what happened to me was similar bro. i have been doing the campaign SLASO and up to my last mission i have been getting a special emblem next to each mission in
my campaign stats.
i did Battle of Sunaion and finished it on legendary with all skulls on and not only did not get my special emblem but it did not even register that i completed the level. so i did it again and the same result or lack of result. it has said i completed the mission 27 times since before i did it the last 2 times.
i am beyond frustrated and disappointed. probably as frustrated as you
Hopefully someone will know what to do or they will show up sometime 
Just fixed the problem, all I did was redo the last mission of the campaign from last checkpoint
I did the misión again too and didnt work for me
Checking in after few days I’ve got now the achievements and the armor! 
Must have been a server/synchro issue …