But Education Minister Chris Hipkins vetoed the University of Victoria's plan to change its name.
The university has instead been pushing ahead with what it is calling a "brand refresh", which opponents have labelled a "name change by stealth".
In his email, Guilford thanked the university's council and senior leadership team.
"As we approach our 125th anniversary, I am confident that Wellington's university will continue to thrive over the many decades to come. Similarly, I am sure that the city and region will continue to benefit from the incredible staff and students of this institution who year-in, year-out, enrich the life of the capital while making the world a better place.
"After my more than two decades in senior leadership roles, my wife and I are looking forward to putting more time into our native forest restoration projects."
The name change stoush was recently reignited after the university successfully applied for a resource consent to install new signage on top of Rutherford House featuring the word "Wellington".
The existing signage says "Victoria University".
Documents obtained by the Herald showed the proposal for new signage uses the word "Wellington" in a large font with "Victoria University of" in a smaller font above it.