I'm having an issue with one of my client websites. Essentially he has some microsites and whenever you are on one of the microsites and you access a path that has the name of the other microsite, instead of seeing a 404 you see the other microsite homepage. For example microsite1.com microsite2.com If you go to microsite1.com/microsite2 (you see the homepage for microsite2.com instead of a 404) The same happens the other way around. We are using Umbraco 13, has anyone encountered this issue before?

Does each micro-site have it's own top level node at the root? Or do all the sites sit under the same node? Also look where the "cultures and hostnames" are configured for each microsites domain, they might be on the same node? It sounds like they haven't been 'separated' correctly unless there is a bug.

They are all appart from each other and the culture and host name is configured for each of those home nodes https://cdn.discordapp.com/attachments/1240987844621897788/1241040171034476647/image.png?ex=6648c03a&is=66476eba&hm=36c060307cbb0586f50d75d8411e6b451829e4561cbec5a3f426c489313447a7&

No problem, thanks for trying. We found out that other project with microsites is showing the same behavior... Either is a bug on the way our boilerplate is setup or it's something on Umbraco itself

There's an appsetting for that! The default for Umbraco is to run with routing that would work for multiple top-level nodes at

/node1

,

/node2

etc. (yeah, it's a feature, not a bug 😉). You can (and should) turn that off for multi-site setups. Set HideTopLevelNodeFromPath to false and you'll get the functionality that you are expecting. appsettings.json:

json
  "Umbraco": {
    "CMS": {
      "Global": {
        "HideTopLevelNodeFromPath": false,

Docs: https://docs.umbraco.com/umbraco-cms/reference/configuration/globalsettings#hide-top-level-nodes-from-path