how can i tell what data a mailbox was migrated

so wondering if the forward box could get unticked if migrated

Yes absolutely right,you lost all previous rule while migrating box.

is it possible to find out the date that a mailbox was migrated on?

Yes all the data will be as it is no change in data,but all rule and setting to client wil be changed andruturn to default.you need to set rule again ad forwarding rule and other rule if you set

is it possible to find out the date that a mailbox was migrated on?

Yes it is possible

how can i find out?

we are using open source (post-fix) and we use rsync to migrate from old server to new server
you can copy data

i just need to know the date that a mailbox was migrated from on premise to office 365
is there not a command or a attribute i can check that shows the date?

why is this being closed?
the question was how can i tell on exactly what date a mailbox was migrated from on prem to cloud
unless im missing something i still dont know

Thanks