Sorry for replying above too quickly. Turns out that, even though the SIS import had gone through, the integration_id fields did not get set unfortunately So I went ahead and tried your suggestion @chriscas , but this time around I got another error (officially a warning, but it really tells me it didn't work): "A new_id, 'blah', referenced an existing user and the user with sis_user_id 'blah' was not updated". So it looks like the suggestion didn't work, after all. Any further advise? Thanks in advance.
for more details, I used the following columns: new_integration_id, old_integration_id, new_id, old_id and 'type' where:
- the old_integration_id values are empty
- the new_id and old_id values are the same (since we're not changing sis ids, just adding integration_id)
- the type is 'user' for all the records