Get-MgAllSite Doesn't Respect the Top Parameter

Describe the bug

I am trying to find the first site with a display name starting with A. The cmdlet ignores the Top parameter (it's also incredibly slow - debug implies that multiple HTTP requests are made to retrieve the sites) and returns all sites with a displayname starting with A.

[array]$Sites = Get-MgAllSite -filter "startsWith(displayName,'A')" -top 1
$Sites.displayName

Azure Automation Runbook Fans
Alain Charnier
Andy's Christmas Party
ALL-IN-1 MAIL
ALL-IN-1 for DOS
Atlanta Restaurants
Ann Conroy (GM Datacenters)
All R &A Users-Everyone is Welcome
Audi e-tron Drivers - Secret Car Plans
All Tenant Member User Accounts
Andrew's Maintenance Planners (Teamwith a

Expected behavior

The expected behavior is that the cmdlet should comply with the Top parameter and return the number of sites specified in the parameter.

How to reproduce

See above.

SDK Version

V2.30

Latest version known to work for scenario above?

No response

Known Workarounds

Use the Graph API request.

Debug output

Status Code:
OK

Headers:
Cache-Control : no-store, no-cache
Vary : Accept-Encoding
Strict-Transport-Security : max-age=31536000
request-id : 4492f3cc-5c24-4167-8b87-e06724efd3ab
client-request-id : a936e6e8-ed31-42f3-9bc3-81bdedfec988
x-ms-ags-diagnostic : {"ServerInfo":{"DataCenter":"North Europe","Slice":"E","Ring":"4","ScaleUnit":"002","RoleInstance":"DU2PEPF0004582C"}}
splogid : 7c82c8a1-9074-a000-4211-67c9056cbfb7
odata-version : 4.0
Date : Tue, 23 Sep 2025 09:50:03 GMT

Body:
{
"@odata.context": "https://graph.microsoft.com/v1.0/$metadata#sites",
"@odata.nextLink": "https://graph.microsoft.com/v1.0/sites/microsoft.graph.getAllSites()?$top=1&$filter=startsWith(displayName%2c%27A%27)&$skiptoken=UGFnZWQ9VFJVRSZwX1RpbWVEZWxldGVkPSZwX0lEPTcwNQ",
"value": [
{
"createdDateTime": "2025-01-22T11:19:37Z",
"id": "redmondassociates.sharepoint.com,7b8c30d5-81a2-4582-bd15-d20e5c3091f5,4f47b8eb-8301-4678-b567-e29204a42441",
"name": "Azure Automation Runbook Fans",
"webUrl": "https://redmondassociates.sharepoint.com/sites/Azure.Automation.Fans",
"displayName": "Azure Automation Runbook Fans",
"isPersonalSite": false,
"siteCollection": {
"hostname": "redmondassociates.sharepoint.com"
},
"root": {}
}
]
}

<Log output here>

Configuration

No response

Other information

$psversiontable

Name Value

PSVersion 7.5.3
PSEdition Core
GitCommitId 7.5.3
OS Microsoft Windows 10.0.26100
Platform Win32NT
PSCompatibleVersions {1.0, 2.0, 3.0, 4.0…}
PSRemotingProtocolVersion 2.3
SerializationVersion 1.1.0.1
WSManStackVersion 3.0

Start with the Get-MgAllSite cmdlet and compare its -Top handling with the Graph response, which includes $top=1 and an @odata.nextLink. Reproduce the supplied filter and verify that the command returns only one site without making unnecessary requests.