I found a solution to my problem at least. It just took some trial and error. I thought m y problem was I had a trailing "?tr=1" at the end of my Minemeld server I needed to remove.
The Objects > External Dynamic LIsts > O365-IPv4, the Source was:
With "?tr=1" listed the IPs in CIDR notation (126.96.36.199/31)
Without "?tr=1" listed the IPs as IP ranges (188.8.131.52-184.108.40.206)
As soon as I dropped the "?tr=1" it worked great!
On another note, it's broken again.
Palo Alto Documentation says the correct syntax is either format so I don't know why it stopped working... and yes, that means it was working for at least a month, then on 03/22/2018, it started erroring out...
Now that I'm typing this, it appears to be happening again.
Removing the "?tr=1" fixed it from to 5/03 - 5/16, but now it's erroring out again. ugh...
... View more