I had that exact issue and just got it fixed today! I don't know if this relates directly to any of you, but here is what happened:
1) I ordered the new 7232 on 4/6 to replace a 6416 I had had for a long time. I did not have multi-room service on the 6416.
2) The 7232 arrived on 4/7, I replaced the 6416 in my network, all ok.
3) On 4/8 l called and tried to get the multi-room feature now that I had a 7232. I went round and round with the agent, she was nice, but insisted I did not have a 7232, only the 6416. Yet MyVerizon showed I had both 7232 and 6416. Eventually she said she had activated multi-room (I suspect on the 6416, which is the only DVR she said I had).
4) Any time I went into the 7232 and tried to verify multi-room, I got exactly the error you guys describe. Finally decided to give up and wait until I had returned the 6416.
5) On 4/15 I shipped the 6416 back to Verizon.
6) Tracked the 6416 return via UPS, showed out for deliver for several days, no confirmation of delivery (still none).
7) Today I checked MyVerizon, the old 6416 had disappeared from my list of STBs (apparently returned successfully).
😎 Called Verizon today, talked to a nice lady (Tammy or Tammi in Tampa), she did not see the 6416 on my account, she requested activation of multi-room. She suggested turning off and on the DVR, said activation would be done "soon".
9) 15-20 minutes later, removed power to DVR and plugged it back in, went to 2500 STB, could magically see recorded programs, viewed an SD recording just fine, on both of my 2500s. So all is now well (and no idea if removing power did anything).
So, my experience is, if you are trading out DVRs, you need to wait until the old DVR is off your account, then call and request multi-room, and it works just great.
Now, eagerly waiting for 1.9 of the IMG so my wife can schedule and delete recordings from her end of the house 
Maybe this extra long story will help someone.
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Justin
Verizon FiOS TV, Internet, and phone
QIP7232, IMG 1.8, Build 02.54
Keller, TX 76248
@doropallo wrote:I am a new customer, 1 month. We have a 7232 and 3-7100s, nothing swapped or returned. Filled out a form that was PM'ed to me and still nada.
Dave,
Ok, sorry. I was going based on the error message you posted, I saw that same message when I ran the troubleshooter. And it was apparently caused because I was not subscribed to the multi-room feature, even though I had ordered it (or at least thought I had). My bad.
But to go back to your posts, it sounds like multi-room was working, and then quit? Or is your issue not being able to use multiple HD streams? Or have I totally misunderstood (I am good at that sometimes....)? 
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Justin
Verizon FiOS TV, Internet, and phone
QIP7232, IMG 1.8, Build 02.54
Keller, TX 76248