Get All SharePoint Online Site Collections Inventory using PowerShell

Requirement: Get all site collections inventory in SharePoint Online using PowerShell

PowerShell to Get All SharePoint Online Site Collections Inventory:
Let's get list of SharePoint Online sites using PowerShell

Import-Module Microsoft.Online.SharePoint.Powershell -DisableNameChecking

#Config Parameters
$AdminSiteURL="https://crescent-admin.sharepoint.com"
$ReportOutput="C:\Temp\SPOStorage.csv"

#Get Credentials to connect to SharePoint Admin Center
$Cred = Get-Credential

#Connect to SharePoint Online Admin Center
Connect-SPOService -Url $AdminSiteURL –Credential $Cred

#Get All site collections
$SiteCollections = Get-SPOSite -Limit All
Write-Host "Total Number of Site collections Found:"$SiteCollections.count -f Yellow

#Array to store Result
$ResultSet = @()

#Loop through each site collection and retrieve details
Foreach ($Site in $SiteCollections)
{
    Write-Host "Processing Site Collection :"$Site.URL -f Yellow

    #Get site collection details    
    $Result = new-object PSObject
    $Result | add-member -membertype NoteProperty -name "Title" -Value $Site.Title
    $Result | add-member -membertype NoteProperty -name "Url" -Value $Site.Url
    $Result | add-member -membertype NoteProperty -name "LastContentModifiedDate" -Value $Site.LastContentModifiedDate
    $Result | add-member -membertype NoteProperty -name "Status" -Value $Site.Status
    $Result | add-member -membertype NoteProperty -name "LocaleId" -Value $Site.LocaleId
    $Result | add-member -membertype NoteProperty -name "LockState" -Value $Site.LockState
    $Result | add-member -membertype NoteProperty -name "StorageQuota" -Value $Site.StorageQuota
    $Result | add-member -membertype NoteProperty -name "StorageQuotaWarningLevel" -Value $Site.StorageQuotaWarningLevel
    $Result | add-member -membertype NoteProperty -name "Used" -Value $Site.StorageUsageCurrent
    $Result | add-member -membertype NoteProperty -name "CompatibilityLevel" -Value $Site.CompatibilityLevel
    $Result | add-member -membertype NoteProperty -name "Template" -Value $Site.Template
    $Result | add-member -membertype NoteProperty -name "SharingCapability" -Value $Site.SharingCapability
    
    $ResultSet += $Result
}  
 
#Export Result to csv file
$ResultSet |  Export-Csv $ReportOutput -notypeinformation
 
Write-Host "Site Quota Report Generated Successfully!" -f Green   

and the result:

Here is the List of all properties you can retrieve from a SharePoint Online site collection:

• LastContentModifiedDate
• Status
• ResourceUsageCurrent
• ResourceUsageAverage
• StorageUsageCurrent
• LockIssue
• WebsCount
• CompatibilityLevel
• DisableSharingForNonOwnersStatus
• Url
• LocaleId
• LockState
• Owner
• StorageQuota
• StorageQuotaWarningLevel
• ResourceQuota
• ResourceQuotaWarningLevel
• Template
• Title
• AllowSelfServiceUpgrade
• DenyAddAndCustomizePages
• PWAEnabled
• SharingCapability
• SandboxedCodeActivationCapability
• DisableCompanyWideSharingLinks
• DisableAppViews
• DisableFlows
• StorageQuotaType
• SharingDomainRestrictionMode
• SharingAllowedDomainList
• SharingBlockedDomainList

Use this PowerShell script in SharePoint Online Management Shell to get all available properties of a SharePoint Online site collection:

#Config Parameters
$AdminSiteURL="https://crescent-admin.sharepoint.com"
$ReportOutput="C:\Temp\SPOStorage.csv"

#Get Credentials to connect to SharePoint Admin Center
$Cred = Get-Credential

#Connect to SharePoint Online Admin Center
Connect-SPOService -Url $AdminSiteURL –Credential $Cred

#Get all Site collections details and Export to CSV
Get-SPOSite -Limit ALL -Detailed | Export-Csv -Path $ReportOutput -NoTypeInformation

PnP PowerShell to Get Site Collection Details in SharePoint Online:

#Config Variables
$SiteURL = "https://crescenttech.sharepoint.com/sites/Marketing"

#Connect to PnP Online
Connect-PnPOnline -Url $AdminCenterURL -Credentials (Get-Credential)

#Get the site collection
$Site = Get-PnPTenantSite -Url $SiteURL -Detailed

#Get Site collection details
Write-host "Title:" $Site.Title
Write-host "Url:" $Site.Url
Write-host "Subsites Count:" $Site.WebsCount
Write-host "Last Content Modified Date:" $Site.LastContentModifiedDate
Write-host "Status:" $Site.Status
Write-host "Lock State:" $Site.LockState
Write-host "Storage Quota:" $Site.StorageMaximumLevel
Write-host "Storage Quota Warning Level:" $Site.StorageWarningLevel
Write-host "Used:" $Site.StorageUsage
Write-host "Compatibility Level:" $Site.CompatibilityLevel
Write-host "Template:" $Site.Template
Write-host "Sharing Capability:" $Site.SharingCapability
Write-host "Site Owner:" $Site.Owner

My Another post on getting all site collections using PowerShell in SharePoint Online: Get All Site Collections using PowerShell