We had plenty of warning.
The umsystems team have consolidated the “lander” user id of those of us with Met Office internal unix IDs. On the new Monsoon (xcs-c) those userids will have no data available unless it was transferred from the previous userid. That includes all data in the /projects/project/useridB working directories (DATADIR). The earlier userid is referred to as UseridB and the consolidated userid is UseridC.
I had to set up a blank id_rsa.pub key on XCM to add to the authorized_keys on XCSC to allow password-less transfer of data.
For the last week I have transferred data from XCM _to_ XCSC by pushing with:
scp -p A useridC@xcslc0:A
Now I find I should have also made a reverse key (oops) as I can only log into my earlier user id (Monsoon terminology useridB) with a password. Which I do not know.
This link is to instructions on the collaboration Twiki which requires a separate login (which hopefully you already know).