I've been attempting to audit about a dozen mailboxes related to a legal matter. Most queued and downloaded just fine, but and I'm getting "Temporary error 600" and today "Temporary error 1000" from gam 2.55 for two of them. I downloaded the new 2.99 beta just to see if it made a difference, and that gives me a "Temp error. Backing off" with an attempt count.
I've checked the info on the user account, and my problem accounts are "Has agreed to terms: true" "Account Suspended: false" and "Must Change Password: false" so they should be fine.
I've ticketed the issue out to Google, but they claim it's a GAM problem, and I need to collect logs and report the incident to Dito. I don't see any logs, and I believe all this is doing is queueing a request with Google so there isn't much complication in GAM at the audit export request stage.