I work in a small business - just over 100 people. All office jobs though we have hybrid working and overall more time is probably spent WFH than in the office.
The business had grown through small acquisitions and one team that came into the business that way almost 4 years ago still isn't using the same processes and systems as the rest of the business simply because they don't want to.
Their way of doing things is out of date. They would be more productive if they changed. It would make it easier to integrate them more fully into the business if they changed.
We're not talking about any complex or bespoke systems or software - just your everyday ways of working that the vast majority of businesses utilise.
I'm not in a position to put my foot down and insist they switch, but my work is affected by having to work to their processes and I don't think it's reasonable for them to think they have a right to say no.
I have raised the issue with senior management but they seem reluctant to do much about it despite wanting them to move over. I think they don't want the hassle and it doesn't really impact on them day to day.
I've offered to demonstrate how easy it is to use. Any other strategies you can suggest if the bosses aren't going to take control?