Extract total mailbox count using PowerShell
Steps
1. Login to exchange online PowerShell
2. Run below mentioned commands to extract total count for respective mailbox type.
User Mailbox
(Get-Recipient -RecipientTypeDetails usermailbox -ResultSize Unlimited).count
Shared Mailbox
(Get-Recipient -RecipientTypeDetails sharedmailbox -ResultSize Unlimited).count
How to clean Teams application cache
Steps
Directory – 1
1. If Teams application is still running, right-click the Teams icon in the taskbar, and then select Quit.
2. Open the Run dialog box by pressing the Windows logo key + R.
3. In the Run dialog box, enter “%appdata%\Microsoft\Teams”, and then select OK.
4. Delete all files and folders in the “%appdata%\Microsoft\Teams” directory.
Directory - 2
1. Open the Run dialog box by pressing the Windows logo key + R.
2. In the Run dialog box, enter “C:\Users\%username%\AppData\Local\Packages\”, and then select OK.
3. Delete all files and folders in the C:\Users\%username%\AppData\Local\Packages\MSTeams_8wekyb3d8bbwe directory.
Final
1. Restart Teams.
Get-CalendarDiagnosticObjects -Identity user1@xyz.com -StartDate "2026-02-01" -EndDate "2026-02-28"
Install OpenSSL
Open PowerShell and cd to OpenSSL install location -
C:\Program Files\OpenSSL-Win64\bin
Extract private key with password (encrypted) -
.\openssl pkcs12 -in certificate.pfx -nocerts -out privatekey.pem
OR
Extract private key without password (unencrypted) -
.\openssl rsa -in privatekey.pem -out privatekey-nopass.pem
Extract certificate -
.\openssl pkcs12 -in certificate.pfx -clcerts -nokeys -out certificate.pem
Combine Certificate and Private key (if required) -
Get-Content privatekey_unencrypted.pem, certificate.pem | Set-Content fullcertificate.pem
$ids = Get-Content C:\New_Folder\123.txt | Where-Object { $_ -match '\S' }
$ids | ForEach-Object { Get-Mailbox -Identity $_ } |Select-Object PrimarySmtpAddress, RecipientTypeDetails |Export-Csv C:\New_Folder\checkmailbox-type.csv -NoTypeInformation -Encoding UTF8