What does the UM stand for in the in the Salesforce instance naming? EU: Europe NA: North America UM:????

Is it new or has it always been present? Never noticed it and I have just found out that my instance will be there in January

  • Where did you get "UM" at all? I checked their Trust site and haven't found any instance with that abbreviation.
    – Eduard
    Commented Dec 12, 2018 at 10:32
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    EXACTLY! but on the instance locations there is! help.salesforce.com/…
    – TheAdmin
    Commented Dec 12, 2018 at 10:35
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    Sometimes Salesforce has custom instances for demo / pre-release /webinars like GS which is not mentioned in trust, The one you mentioned UM seems like the same. Commented Dec 12, 2018 at 10:38
  • What mail you got with respect to UM ? is it related to org migration to new Instance? Which region are you based? Commented Dec 12, 2018 at 10:41
  • @PranayJaiswal what is 'GS' -- also does that mean it will change to an 'EU' instance after the pre-release? Is there any documentation to support this? Email: ATTENTION: Your new instance name will be UM4 following the instance refresh on January 19 status.salesforce.com/maintenances/28535
    – TheAdmin
    Commented Dec 12, 2018 at 10:45

2 Answers 2


It refer to London, UK (North) / London, UK (West).

As per docs: We will soon have two geographically dispersed data centers in the London, UK metropolitan area - London, UK (North) and London, UK (West).

Where is my Salesforce instance located?

  • I know, but my question was different... what does it stand for? + has it always been there? (on trust it isnt there!)
    – TheAdmin
    Commented Dec 12, 2018 at 10:36
  • @TheAdmin Not sure but maybe UK metropolitan(UM). This is not on trust site because they are still new and Salesforce didn't move any customer site on them so no need. Not quite sure. Commented Dec 12, 2018 at 10:40
  • All UK customers I met has EU instance, I dont know if it was a specific requirement after BREXIT to move data from Europe data centers to UK data Centers. Commented Dec 12, 2018 at 10:42
  • ^^^ That is exactly my concern! but there are no articles that describe this! (especially as we aren't even based in the UK!)
    – TheAdmin
    Commented Dec 12, 2018 at 10:46
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    According to GDPR stuff I heard, EU data should be inside EU no matter what, after brexit that wont be the case so I dont know if UM should even be considered for your org migration. The best bet is to raise a case or mail your account manager Commented Dec 12, 2018 at 10:49

From a SF slide deck "Tech Updates December 2018 Edition":

"Going forward, we will have two separate subregions within the EMEA region: UMEA (UK, Middle East & Africa) and EU (Rest of Europe & Russia) with UM and EU instances, respectively. UM instances will be supported by two data centers in the London, UK metro area and EU instances will be supported by our France & Germany data centers. "

Full overview of instances and location, as already mentioned in another answer, see https://help.salesforce.com/articleView?id=000257307&language=en_US&type=1

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