Office 365 mailbox shows full instead of In-Place archiving

How to check the execution policy set to unrestricted?

check if the execution policy is set to unrestricted.

I tried the below commands. All run properly except the last command.

Install-Module MSOnline
$Msolcred = Get-credential
Connect-MsolService -Credential $MsolCred
Start-ManagedFolderAssistant -Identity "Chris"

In the last command, what should I write in place of "Chris"?

PS C:\WINDOWS\system32> Start-ManagedFolderAssistant -Identity "rizwan"
Start-ManagedFolderAssistant : The term 'Start-ManagedFolderAssistant' is not recognized as the name of a cmdlet,
function, script file, or operable program. Check the spelling of the name, or if a path was included, verify that the
path is correct and try again.
At line:1 char:1
+ Start-ManagedFolderAssistant -Identity "rizwan"
+ ~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+ CategoryInfo : ObjectNotFound: (Start-ManagedFolderAssistant:String) [], CommandNotFoundException
+ FullyQualifiedErrorId : CommandNotFoundException

OK, let me try all these commands on other machines and then I will get back to you.

can you try this from different machine , seems something wrong with your modules version on this machine

After running the first command, I entered Global Admin Credentials.

PS C:\WINDOWS\system32> $cred = Get-Credential

cmdlet Get-Credential at command pipeline position 1
Supply values for the following parameters:
Credential
PS C:\WINDOWS\system32> $cred = Get-Credential

cmdlet Get-Credential at command pipeline position 1
Supply values for the following parameters:
Credential
PS C:\WINDOWS\system32> Connect-ExchangeOnline -Credential $cred -ShowProgress $true

----------------------------------------------------------------------------
The module allows access to all existing remote PowerShell (V1) cmdlets in addition to the 9 new, faster, and more reliable cmdlets.

|--------------------------------------------------------------------------|
| Old Cmdlets | New/Reliable/Faster Cmdlets |
|--------------------------------------------------------------------------|
| Get-CASMailbox | Get-EXOCASMailbox |
| Get-Mailbox | Get-EXOMailbox |
| Get-MailboxFolderPermission | Get-EXOMailboxFolderPermission |
| Get-MailboxFolderStatistics | Get-EXOMailboxFolderStatistics |
| Get-MailboxPermission | Get-EXOMailboxPermission |
| Get-MailboxStatistics | Get-EXOMailboxStatistics |
| Get-MobileDeviceStatistics | Get-EXOMobileDeviceStatistics |
| Get-Recipient | Get-EXORecipient |
| Get-RecipientPermission | Get-EXORecipientPermission |
|--------------------------------------------------------------------------|

To get additional information, run: Get-Help Connect-ExchangeOnline or check https://aka.ms/exops-docs

Send your product improvement suggestions and feedback to email address removed for privacy reasons. For issues related to the module, contact Microsoft support. Don't use the feedback alias for problems or support issues.
----------------------------------------------------------------------------

New-ExoPSSession : Connecting to remote server outlook.office365.com failed with the following error message : For more information, see the
about_Remote_Troubleshooting Help topic.
At C:\Program Files\WindowsPowerShell\Modules\ExchangeOnlineManagement\2.0.5\netFramework\ExchangeOnlineManagement.psm1:475 char:30
+ ... PSSession = New-ExoPSSession -ExchangeEnvironmentName $ExchangeEnviro ...
+ ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+ CategoryInfo : ResourceUnavailable: (:) [New-ExoPSSession], PSRemotingTransportException
+ FullyQualifiedErrorId : System.Management.Automation.Remoting.PSRemotingDataStructureException,Microsoft.Exchange.Management.ExoPowershellSna
pin.NewExoPSSession

$cred = Get-Credential
Connect-ExchangeOnline -Credential $cred -ShowProgress $true

I used all the commands and received the below errors:

PS C:\WINDOWS\system32> Install-Module ExchangeOnlineManagement

Untrusted repository
You are installing the modules from an untrusted repository. If you trust this repository, change its InstallationPolicy value by running the
Set-PSRepository cmdlet. Are you sure you want to install the modules from 'PSGallery'?
[Y] Yes [A] Yes to All [N] No [L] No to All [S] Suspend [?] Help (default is "N"): y

WARNING: Version '2.0.5' of module 'ExchangeOnlineManagement' is already installed at 'C:\Program
Files\WindowsPowerShell\Modules\ExchangeOnlineManagement\2.0.5'. To install version '3.1.0', run Install-Module and add the -Force parameter, this
command will install version '3.1.0' in side-by-side with version '2.0.5'.

PS C:\WINDOWS\system32> Connect-ExchangeOnline

----------------------------------------------------------------------------
The module allows access to all existing remote PowerShell (V1) cmdlets in addition to the 9 new, faster, and more reliable cmdlets.

|--------------------------------------------------------------------------|
| Old Cmdlets | New/Reliable/Faster Cmdlets |
|--------------------------------------------------------------------------|
| Get-CASMailbox | Get-EXOCASMailbox |
| Get-Mailbox | Get-EXOMailbox |
| Get-MailboxFolderPermission | Get-EXOMailboxFolderPermission |
| Get-MailboxFolderStatistics | Get-EXOMailboxFolderStatistics |
| Get-MailboxPermission | Get-EXOMailboxPermission |
| Get-MailboxStatistics | Get-EXOMailboxStatistics |
| Get-MobileDeviceStatistics | Get-EXOMobileDeviceStatistics |
| Get-Recipient | Get-EXORecipient |
| Get-RecipientPermission | Get-EXORecipientPermission |
|--------------------------------------------------------------------------|

To get additional information, run: Get-Help Connect-ExchangeOnline or check https://aka.ms/exops-docs

Send your product improvement suggestions and feedback to email address removed for privacy reasons. For issues related to the module, contact Microsoft support. Don't use the feedback alias for problems or support issues.
----------------------------------------------------------------------------

New-ExoPSSession : Connecting to remote server outlook.office365.com failed with the following error message : For more information, see the
about_Remote_Troubleshooting Help topic.
At C:\Program Files\WindowsPowerShell\Modules\ExchangeOnlineManagement\2.0.5\netFramework\ExchangeOnlineManagement.psm1:475 char:30
+ ... PSSession = New-ExoPSSession -ExchangeEnvironmentName $ExchangeEnviro ...
+ ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+ CategoryInfo : ResourceUnavailable: (:) [New-ExoPSSession], PSRemotingTransportException
+ FullyQualifiedErrorId : System.Management.Automation.Remoting.PSRemotingDataStructureException,Microsoft.Exchange.Management.ExoPowershellSna
pin.NewExoPSSession

please use the below instead

Install-Module ExchangeOnlineManagement
Connect-ExchangeOnline
Start-ManagedFolderAssistant .....

yes, it is