On October 14, 2025, 9 months from today, Exchange Server 2016 and Exchange Server 2019 reach end of support. After October 14, 2025, Microsoft will no longer provide technical support for problems t...
Updated Jan 23, 2025
Version 3.0
Blog Post
Nino_Bilic
Microsoft
MicrosoftCU15 is coming "soon". I am sorry, I know this does not answer what you are asking, but it is true. There is no "date" that we have planned and are waiting for to arrive, rather, we will release when we are ready to release. CU15 being an RTM equivalent for Exchange Server SE, we want to be able to make good on the promise of not making changes in SE RTM (other than security update payload between CU15 and SE RTM release).
BTW, we (Exchange team) never release CUs on Patch Tuesday; this is a "security update day" really, and we would traditionally release CUs a week after (but that is just a soft target, we can release a CU any day we have it ready to release, except we specifically try to avoid Patch Tuesday). SUs we would release on Patch Tuesday.
I just updated that post also, thanks for pointing that out. Truth is - the through to update this before has crossed my mind but then I forgot to do it. :(
Cu15 had two dates where it was scheduled to arrive: H2/2024 and January 2025.
Is the October 2025 date for Exchange SE set in stone or may the release also be moved to 2026?