Thanks, that sounds like a good approach...I'll reset and re-do.
Funny - got the UCG Ultra reconnected and things running normally again 5 minutes before wife walked in and sat down at her desk to work on her afternoon projects due today. Kind of a "phew" moment... 
What I don't get is why it wasn't accessible for me when it had my setup from my UCG Ultra restored on it...seems odd.
I try what you suggest, hopefully things will go better.
You may be able to plug it in somewhere behind your Ultra to try to set it up like a switch. Once the initial setup is done and you have it added to Site Manager you should be able to swap it at your leisure. I believe that is what I did initially.
OK, I first reset the Max (10 pin in reset hole).
Then plugged Max WAN port into a port on one of my switches (port set to the Default network) and then plugged my laptop into the Max via ethernet and it completed set up, but after setup it's in its own site (UCG Max), and not showing up as a device in the existing site (UCG Ultra) which is not what I thought would happen...sounds different from what you described above.
I need another nudge...
I did initially plug the Max into the switch (not using the Max's WAN port) after reset, and did not connect my laptop directly to the Max, expecting the Max would show up for Adoption in the existing site, but the Max never showed up in the list of Unifi devices in the UCG Ultra site. I must be missing a step... @jkudave, also appreciate any suggestions you may have.
I think I can just try another Restore to the new UCG Max site of the last backup of my UCG Ultra...then remove the Ultra from the network and Plug in the Max in its place...
I think that is right. Go to the max and do your restore of the network app. Then it should be ready to swap with the ultra.
OK...that looks like it should work (but so did the first backup restore so what do I know). 
Still don't get why the first restore of the backup didn't result in a clean cut-over. 
Try this. You will need to be offline for a bit.
Reset the device again.
Remove the CGU.
Replace with the new Max.
Connect your Internet/WAN connection.
Use your phone with the UniFi Network app to do initial setup. Let it update firmware if needed.
After that, you should be able to connect to a port on the Max, login and restore your backup.
Reboot after restore and you should be good to go.
The backup probably should have worked. Atleast now you know it is connected and to your site manager. It may be a good idea to download a backup from youe ultra again just to make sure you have a good copy.
Before/after the device reset, should I also remove the UCG Max site that was just created?
Wondering - if I do the reset while the device is connected to the internet, will the UCG Max site just created get removed automagically?
@mavrrick58 - thanks, good idea, I'll take/download another backup.
I would.
Never done this, off to look up some videos. I assume it's a BTLE thing and I need to be next to the Max to do it. Does initial setup auto-initiate if you have the app open when the Unifi boots up?
It might take a moment or so, but it should see the new device.
If you are still having a hard time getting the Max setup using the phone app, check out this video. He goes from a Dream Router to a Max, but the concept/steps he uses should be the same for your migration. He does mention you can use a device with Bluetooth to connect/ setup and restore a backup but doesn’t do so.
LOL, I was just watching that, Looks so easy for him...I kinda hate him now. 
Following his way I would do a restore of a backup of my CG Ultra to the Max and then connect it in the Ultra's place, which is what I did the first time.
I will look into using my phone on the next try...
It's about time...
I ended up restoring a backup (.unifi backup file) downloaded to my laptop from the Ultra. Did it w/the Max connected via a switch to my Ultra network.
Let the backup restore completely and CG Max come back up and I ended up w/below (still connected to network via the Ultra). So both sites showed up and both sites had the same Network app settings/setup as desired:
Both also had the same site name ("Ultra") so I renamed the Max site to UCG Max, (done in below in Settings>Control Plane>Console in case anyone's wondering), and then shut the Ultra, cable modem, and Max down, swapped in Max for Ultra, booted up cable modem, then when it was up booted up Max, and...
...it's mine, alllllll mine.
Everything got adopted over to the new UCG Max site w/out issue so far as I can tell (the "Retired" Flex Mini is intentionally offline). After a while I'll delete the UCG Ultra site, but for now keeping it around in case something goes south (either my mistake or some random early die-off of the Max).
Thanks very much for the calming support/suggestions, @mavrrick58 & @jkudave, very helpful. Still a mystery why it didn't go the first time as the steps were pretty much the same, but I'll take a win and not complain.
See you tomorrow when my network crashes and wife asks me to move out. 
OK you U7-* early adopters.
Son needs an AP, so he may get my U6-LR and Daddy will get a new U7-Pro (since evidently there isn't a U7-LR?).
Have they finally fixed things w/the U7 APs, in particular the U7-Pro?
Also wondering if the coverage of the U7-Pro matches up w/the U6-LR, which has been really great for me (what I've seen so far seems like range on the LR is better). On Unifi's site U6-LR are sold out, but B&H has them so I may fall back on getting him a U6-LR if the U7 stuff is still a mess or not an appropriate upgrade for me due to reduced range...
I only have the u7 pro in wall. Unifi just made a firmeware GA that has MLO. It is hard to say if all the kinks have been worked out as so many folks have different experiences. My experience has been pretty good though with my 2 units though.
Another thing to consider is Unifi just announced the U7 wall and the U7 Lite. These non pro AP units basically just leave off the 6ghz band. They still have multi Gig wireless speeds with wifi 7 and MLO. They also both have 2.5gbps uplink. The U7 wall also includes a POE passthrough 2.5gbps port and a non PoE 2.5gbps port to attach to devices that need a uplink to the network.
If you dont have allot of close neighbors you may be able to not worry about 6ghz and use that.
The U7 Pro Max just adds another pair of spatial streams to the 5ghz band. This would allow that AP to carry more data and support more devices. Keep in mind though it only has a 2.5gbps uplink
The U7 pro max would be the most equivalent to the U6-LR based on specs. I will say though the U7 Pro Inwalls have been really nice. I turned down all of the transmit power settings to reduce interference and help with roaming and it has been great. I would consider two u7 Pro Inwalls or U7 Pro's before one max if it was myself.
If you want a AP that doesn't need to be mouneted on the ceiling/wall the U7 Pro Walls i have also have a nice metal stand option.
Ofcourse all of it is POE and all the U7 Pro gear need more power then the previous gen stuff. The U7 Pro gear needs PoE+ at a min since they can draw upto 22 watts. Just keep that in mind.
I have had no issues with my U7-Pro. They have updated the firmware multiple times since I bought it, and it is working well for me. The range is pretty darn good, IMHO. I like having the 6GHz radio, as I live in a neighborhood with lots of other WiFi signals.
I do have a FlexHD and a NanoHD as well.
IIRC, the U7-Pro may have a cooling fan in it. I have never heard the fan run, though. I have it ceiling mounted in a hallway.
This is a nice touch/feature with those APs. I'm waiting on/hoping for a U7 Mesh, which should be the successor to the current U6 Mesh which I run 2 of here at home. The cylinder design is perfect for my needs.
Some interesting comments on the U7 around the internet. Most are pretty positive. But I will tell you one thing I have learned from our network engineering teams at work and why there is such a strong push for the WiFi 7 rollout. The older standards are competing with fully realizing the potential of WiFi 7. The mess with older standards a/b/g/n on 2.4 GHz is the noise in the airwaves along with 5 GHz n. And security protocols WEP/WPA/WPA2/WPA3.
What they plan to do with WiFi 7 is create a super traffic cop that will not only provide the larger capacity of clients but also curtail and better manage the older standards until devices are "retired". If you look at the spec sheets for WiFi 7 and mitigated features, you will notice experimental features that made it into chipsets without the approval of the working committee are being left out completely.
@mavrrick58, can you share a little bit more about your experience with U7 Pro Walls? Basically, I'm concerned about the strength of their WiFi that occurs behind them. I've got two spots in the house that need table stand APs since wall/ceiling mountings are not an option. That basically leaves me with the U7 Pro Walls and Stand, the U6 Mesh, and the new Express 7 as my options. I'm worried that the Walls do not send the single strong enough behind them compared to the more omnidirectional antennas of the other two options.
Download the Hubitat app
