scan to office 365 PROBS

[tekkie]

Any IDEAS welcome.Just installed 7 new Canon ir adv c 250 mcs in the same building.Set up all 7 mcs with identical settings and 5 of the mcs scan to email with office 365 and 2 fail.
Have checked every setting on good working mc with a non functioning one.All mcs are at same firmware levels all on same network.
Ports ,TLS settings etc are all the same all set up with same known 365 account and password
in one office I have 2 mcs working and 2 not.
I also have installed a Canon ir adv 3300 in same firm as well and this works ok
Have tried exporting settings from good mc to one not scanning still fails.
it comes up with 801 transmission failure.
Have hit a brick wall with this one
Help

[bsm2]

Is Office 365 setup with a mail relay? If so you will need to add the machine ip address to it

[tekkie]

None of the other mcs were setup to relay that do work and even tried changing the IP address of a known worker and putting that IP IN A NON WORKER STILL NO JOY

[mincopier]

Does it need a customer certificate created or recreated for the machine. I know on our Konicaminolta's need this.