I just got my email and message that I was approved for the multiplayer technical preview, and went to enter my steam key to install it. When I clicked enter, I was told that this product key had already been activated on another account. Is this a common problem? Was my key stolen somehow, or are the keys not active yet?
Same problem 
Same here
> 2535463680729593;1:
> I just got my email and message that I was approved for the multiplayer technical preview, and went to enter my steam key to install it. When I clicked enter, I was told that this product key had already been activated on another account. Is this a common problem? Was my key stolen somehow, or are the keys not active yet?
343i are aware of the issue and should be able to get new codes to those affected on Friday. Source
> 2533274865778947;4:
> > 2535463680729593;1:
> > I just got my email and message that I was approved for the multiplayer technical preview, and went to enter my steam key to install it. When I clicked enter, I was told that this product key had already been activated on another account. Is this a common problem? Was my key stolen somehow, or are the keys not active yet?
>
> 343i are aware of the issue and should be able to get new codes to those affected on Friday. Source
Oh, that’s great to hear the issue is being fixed! Was worried I wouldnt have access! Thanks bro.
343 are aware of issues with duplicate/invalid Steam keys and will be addressing this.
Please see my post here and follow that thread for further updates:
https://www.halowaypoint.com/en-us/forums/243780d3b80b4bb6ac7917a8942286db/topics/psa-halo-technical-preview-2-updates/511173a1-85aa-4941-b02f-12645a4917ea/posts?page=1#post6
<mark>For anyone dealing with the duplicate/invalid Steam code issue - please file a support ticket on the Insider Support Site:</mark>
https://insidersupport.halowaypoint.com/hc/en-us