ms365-tenant-manager

Microsoft 365 tenant administration for Global Administrators. Automate M365 tenant setup, Office 365 admin tasks, Azure AD user management, Exchange Online configuration, Teams administration, and security policies. Generate PowerShell scripts for bulk operations, Conditional Access policies, license management, and compliance reporting. Use for M365 tenant manager, Office 365 admin, Azure AD users, Global Administrator, tenant configuration, or Microsoft 365 automation.

Install with Tessl CLI

npx tessl i github:alirezarezvani/claude-skills --skill ms365-tenant-manager

What are skills?

1.07x

Quality

100%

Does it follow best practices?

Impact

95%

1.07x

Average score across 6 eval scenarios

SKILL.md

Review

Evals

Microsoft 365 Tenant Manager

Expert guidance and automation for Microsoft 365 Global Administrators managing tenant setup, user lifecycle, security policies, and organizational optimization.

Quick Start

Run a Security Audit

Connect-MgGraph -Scopes "Directory.Read.All","Policy.Read.All","AuditLog.Read.All"
Get-MgSubscribedSku | Select-Object SkuPartNumber, ConsumedUnits, @{N="Total";E={$_.PrepaidUnits.Enabled}}
Get-MgPolicyAuthorizationPolicy | Select-Object AllowInvitesFrom, DefaultUserRolePermissions

Bulk Provision Users from CSV

# CSV columns: DisplayName, UserPrincipalName, Department, LicenseSku
Import-Csv .\new_users.csv | ForEach-Object {
    $passwordProfile = @{ Password = (New-Guid).ToString().Substring(0,16) + "!"; ForceChangePasswordNextSignIn = $true }
    New-MgUser -DisplayName $_.DisplayName -UserPrincipalName $_.UserPrincipalName `
               -Department $_.Department -AccountEnabled -PasswordProfile $passwordProfile
}

Create a Conditional Access Policy (MFA for Admins)

$adminRoles = (Get-MgDirectoryRole | Where-Object { $_.DisplayName -match "Admin" }).Id
$policy = @{
    DisplayName = "Require MFA for Admins"
    State = "enabledForReportingButNotEnforced"   # Start in report-only mode
    Conditions = @{ Users = @{ IncludeRoles = $adminRoles } }
    GrantControls = @{ Operator = "OR"; BuiltInControls = @("mfa") }
}
New-MgIdentityConditionalAccessPolicy -BodyParameter $policy

Workflows

Workflow 1: New Tenant Setup

Step 1: Generate Setup Checklist

Confirm prerequisites before provisioning:

Global Admin account created and secured with MFA
Custom domain purchased and accessible for DNS edits
License SKUs confirmed (E3 vs E5 feature requirements noted)

Step 2: Configure and Verify DNS Records

# After adding the domain in the M365 admin center, verify propagation before proceeding
$domain = "company.com"
Resolve-DnsName -Name "_msdcs.$domain" -Type NS -ErrorAction SilentlyContinue
# Also run from a shell prompt:
# nslookup -type=MX company.com
# nslookup -type=TXT company.com   # confirm SPF record

Wait for DNS propagation (up to 48 h) before bulk user creation.

Step 3: Apply Security Baseline

# Disable legacy authentication (blocks Basic Auth protocols)
$policy = @{
    DisplayName = "Block Legacy Authentication"
    State = "enabled"
    Conditions = @{ ClientAppTypes = @("exchangeActiveSync","other") }
    GrantControls = @{ Operator = "OR"; BuiltInControls = @("block") }
}
New-MgIdentityConditionalAccessPolicy -BodyParameter $policy

# Enable unified audit log
Set-AdminAuditLogConfig -UnifiedAuditLogIngestionEnabled $true

Step 4: Provision Users

$licenseSku = (Get-MgSubscribedSku | Where-Object { $_.SkuPartNumber -eq "ENTERPRISEPACK" }).SkuId

Import-Csv .\employees.csv | ForEach-Object {
    try {
        $user = New-MgUser -DisplayName $_.DisplayName -UserPrincipalName $_.UserPrincipalName `
                           -AccountEnabled -PasswordProfile @{ Password = (New-Guid).ToString().Substring(0,12)+"!"; ForceChangePasswordNextSignIn = $true }
        Set-MgUserLicense -UserId $user.Id -AddLicenses @(@{ SkuId = $licenseSku }) -RemoveLicenses @()
        Write-Host "Provisioned: $($_.UserPrincipalName)"
    } catch {
        Write-Warning "Failed $($_.UserPrincipalName): $_"
    }
}

Validation: Spot-check 3–5 accounts in the M365 admin portal; confirm licenses show "Active."

Workflow 2: Security Hardening

Step 1: Run Security Audit

Connect-MgGraph -Scopes "Directory.Read.All","Policy.Read.All","AuditLog.Read.All","Reports.Read.All"

# Export Conditional Access policy inventory
Get-MgIdentityConditionalAccessPolicy | Select-Object DisplayName, State |
    Export-Csv .\ca_policies.csv -NoTypeInformation

# Find accounts without MFA registered
$report = Get-MgReportAuthenticationMethodUserRegistrationDetail
$report | Where-Object { -not $_.IsMfaRegistered } |
    Select-Object UserPrincipalName, IsMfaRegistered |
    Export-Csv .\no_mfa_users.csv -NoTypeInformation

Write-Host "Audit complete. Review ca_policies.csv and no_mfa_users.csv."

Step 2: Create MFA Policy (report-only first)

$policy = @{
    DisplayName = "Require MFA All Users"
    State = "enabledForReportingButNotEnforced"
    Conditions = @{ Users = @{ IncludeUsers = @("All") } }
    GrantControls = @{ Operator = "OR"; BuiltInControls = @("mfa") }
}
New-MgIdentityConditionalAccessPolicy -BodyParameter $policy

Validation: After 48 h, review Sign-in logs in Entra ID; confirm expected users would be challenged, then change State to "enabled".

Step 3: Review Secure Score

# Retrieve current Secure Score and top improvement actions
Get-MgSecuritySecureScore -Top 1 | Select-Object CurrentScore, MaxScore, ActiveUserCount
Get-MgSecuritySecureScoreControlProfile | Sort-Object -Property ActionType |
    Select-Object Title, ImplementationStatus, MaxScore | Format-Table -AutoSize

Workflow 3: User Offboarding

Step 1: Block Sign-in and Revoke Sessions

$upn = "departing.user@company.com"
$user = Get-MgUser -Filter "userPrincipalName eq '$upn'"

# Block sign-in immediately
Update-MgUser -UserId $user.Id -AccountEnabled:$false

# Revoke all active tokens
Invoke-MgInvalidateAllUserRefreshToken -UserId $user.Id
Write-Host "Sign-in blocked and sessions revoked for $upn"

Step 2: Preview with -WhatIf (license removal)

# Identify assigned licenses
$licenses = (Get-MgUserLicenseDetail -UserId $user.Id).SkuId

# Dry-run: print what would be removed
$licenses | ForEach-Object { Write-Host "[WhatIf] Would remove SKU: $_" }

Step 3: Execute Offboarding

# Remove licenses
Set-MgUserLicense -UserId $user.Id -AddLicenses @() -RemoveLicenses $licenses

# Convert mailbox to shared (requires ExchangeOnlineManagement module)
Set-Mailbox -Identity $upn -Type Shared

# Remove from all groups
Get-MgUserMemberOf -UserId $user.Id | ForEach-Object {
    try { Remove-MgGroupMemberByRef -GroupId $_.Id -DirectoryObjectId $user.Id } catch {}
}
Write-Host "Offboarding complete for $upn"

Validation: Confirm in the M365 admin portal that the account shows "Blocked," has no active licenses, and the mailbox type is "Shared."

Best Practices

Tenant Setup

Enable MFA before adding users
Configure named locations for Conditional Access
Use separate admin accounts with PIM
Verify custom domains (and DNS propagation) before bulk user creation
Apply Microsoft Secure Score recommendations

Security Operations

Start Conditional Access policies in report-only mode
Review Sign-in logs for 48 h before enforcing a new policy
Never hardcode credentials in scripts — use Azure Key Vault or Get-Credential
Enable unified audit logging for all operations
Conduct quarterly security reviews and Secure Score check-ins

PowerShell Automation

Prefer Microsoft Graph (Microsoft.Graph module) over legacy MSOnline
Include try/catch blocks for error handling
Implement Write-Host/Write-Warning logging for audit trails
Use -WhatIf or dry-run output before bulk destructive operations
Test in a non-production tenant first

Reference Guides

references/powershell-templates.md

Ready-to-use script templates
Conditional Access policy examples
Bulk user provisioning scripts
Security audit scripts

references/security-policies.md

Conditional Access configuration
MFA enforcement strategies
DLP and retention policies
Security baseline settings

references/troubleshooting.md

Common error resolutions
PowerShell module issues
Permission troubleshooting
DNS propagation problems

Limitations

Constraint	Impact
Global Admin required	Full tenant setup needs highest privilege
API rate limits	Bulk operations may be throttled
License dependencies	E3/E5 required for advanced features
Hybrid scenarios	On-premises AD needs additional configuration
PowerShell prerequisites	Microsoft.Graph module required

Required PowerShell Modules

Install-Module Microsoft.Graph -Scope CurrentUser
Install-Module ExchangeOnlineManagement -Scope CurrentUser
Install-Module MicrosoftTeams -Scope CurrentUser

Required Permissions

Global Administrator — Full tenant setup
User Administrator — User management
Security Administrator — Security policies
Exchange Administrator — Mailbox management

Repository: alirezarezvani/claude-skills
Commit: a028cc7
Last updated: 1 day ago
Created: 1 day ago

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