External guest invitation followed by Microsoft Entra ID PowerShell signin

Original query, unchanged.

let queryfrequency = 1h;
let queryperiod = 1d;
AuditLogs
| where TimeGenerated > ago(queryperiod)
| where OperationName in ("Invite external user", "Bulk invite users - started (bulk)", "Invite external user with reset invitation status")
| extend InitiatingAppName = tostring(InitiatedBy.app.displayName)
| extend InitiatingAppServicePrincipalId = tostring(InitiatedBy.app.servicePrincipalId)
| extend InitiatingUserPrincipalName = tostring(InitiatedBy.user.userPrincipalName)
| extend InitiatingAadUserId = tostring(InitiatedBy.user.id)
| extend InitiatingIpAddress = tostring(iff(isnotempty(InitiatedBy.user.ipAddress), InitiatedBy.user.ipAddress, InitiatedBy.app.ipAddress))
| extend InitiatedBy = iff(isnotempty(InitiatingUserPrincipalName), InitiatingUserPrincipalName, InitiatingAppName)
// Uncomment the following line to filter events where the inviting user was a guest user
//| where InitiatedBy has_any ("live.com#", "#EXT#")
| mv-apply TargetResource = TargetResources on 
  (
      where TargetResource.type =~ "User"
      | extend InvitedUser = tostring(TargetResource.userPrincipalName)
  )
| mv-expand UserToCompare = pack_array(InitiatedBy, InvitedUser) to typeof(string)
| where UserToCompare has_any ("live.com#", "#EXT#")
| extend
    parsedUser = replace_string(tolower(iff(UserToCompare startswith "live.com#", tostring(split(UserToCompare, "#")[1]), tostring(split(UserToCompare, "#EXT#")[0]))), "@", "_"),
    InvitationTime = TimeGenerated
| join (
    (union isfuzzy=true SigninLogs, AADNonInteractiveUserSignInLogs)
    | where TimeGenerated > ago(queryfrequency)
    | where UserType != "Member"
    | where AppId has_any                       // This web may contain a list of these apps: https://msshells.net/
        ("1b730954-1685-4b74-9bfd-dac224a7b894",// Azure Active Directory PowerShell
         "04b07795-8ddb-461a-bbee-02f9e1bf7b46",// Microsoft Azure CLI
         "1950a258-227b-4e31-a9cf-717495945fc2",// Microsoft Azure PowerShell
         "a0c73c16-a7e3-4564-9a95-2bdf47383716",// Microsoft Exchange Online Remote PowerShell
         "fb78d390-0c51-40cd-8e17-fdbfab77341b",// Microsoft Exchange REST API Based Powershell
         "d1ddf0e4-d672-4dae-b554-9d5bdfd93547",// Microsoft Intune PowerShell
         "9bc3ab49-b65d-410a-85ad-de819febfddc",// Microsoft SharePoint Online Management Shell
         "12128f48-ec9e-42f0-b203-ea49fb6af367",// MS Teams Powershell Cmdlets
         "23d8f6bd-1eb0-4cc2-a08c-7bf525c67bcd",// Power BI PowerShell
         "31359c7f-bd7e-475c-86db-fdb8c937548e",// PnP Management Shell
         "90f610bf-206d-4950-b61d-37fa6fd1b224",// Aadrm Admin Powershell
         "14d82eec-204b-4c2f-b7e8-296a70dab67e",// Microsoft Graph PowerShell
         "9cee029c-6210-4654-90bb-17e6e9d36617" // Power Platform CLI - pac"
        )
    | summarize arg_min(TimeGenerated, *) by UserPrincipalName
    | extend
        parsedUser = replace_string(UserPrincipalName, "@", "_"),
        SigninTime = TimeGenerated
    )
    on parsedUser
| project InvitationTime, InitiatedBy, InitiatingUserPrincipalName, InitiatingAadUserId, InitiatingAppName, InitiatingAppServicePrincipalId, InitiatingIpAddress, OperationName, InvitedUser, SigninTime, SigninCategory = Category1, SigninUserPrincipalName = UserPrincipalName, AppDisplayName, ResourceDisplayName, UserAgent, InvitationAdditionalDetails = AdditionalDetails, InvitationTargetResources = TargetResources
| extend InvitedUserName = tostring(split(InvitedUser,'@',0)[0]), InvitedUserUPNSuffix = tostring(split(InvitedUser,'@',1)[0]), 
         InitiatedByName = tostring(split(InitiatingUserPrincipalName,'@',0)[0]), InitiatedByUPNSuffix = tostring(split(InitiatingUserPrincipalName,'@',1)[0])