At work we are going through a change with a partner (business we work with) and will require them sending over customer details for us to upload to our systems.
Team leader asked for them to be sending individually for each customer, I assume to make it easier, but the partner said they have so we aren't the only business they are doing this business change with, that it won't be possible.
Line manager than said to me when we left the meeting that she wasn't happy with the partner for not following the request to be sent per customer and not just attached whatever they have an in any order.
I'm not sure if it really makes a difference being sent individually or just whatever they have, I guess it would save us some work but also as this partner is mega busy as well (so much work from both sides) than I think a bit of understanding both ways help.
Back story is I'm getting annoyed with team leader (I don't report to her) always "not being happy" with colleagues and partners etc.
I personally think that wasn't justified aibu