Daylight Saving Time Correction for Microsoft Office Outlook Calendars - Help desk guidelines

I wonder if you could confirm my understanding of how the issue affects UK/Europe, and whether my approach is correct?

I work in the UK, part of a global organisation. I am planning to update client and server OS's with the DST update; then update the Exchange server OS's and finally apply the Exchange server DST update.

I do not think that I need to run the rebase tools for my UK user's calendars. My colleagues in the US are going to be running rebase for their users. The reason I don't think I need to run rebase is that I think that any meetings organised by US/Canada colleagues, that UK people are attendees for, will result in meeting Updates being sent to UK people (generated by rebase), which when the UK people accept will then show the correct local and remote time; and any meetings that UK people have organised, and invited US/Canada people to, will also "just work" because the originating time zone (GMT) is unaffected. Do you think this is correct? I am reluctant to run the rebase tool if I can avoid it.
Thanks in advance for any help.

Regards
Richard Read