Assign Specific Licences in Office 365 Via PowerShell

To add specific licences to users in Office 365 without using the portal, and to assign subsets of the licences available requires two things. First you need to enumerate the licences and licence service plans, then you need to assign the new plan you have created to your users. This can be performed in bulk and is repeatable unlike when using the portal.
First, enumerate the licence plans and create your own licence:

1. Open Microsoft Online Services Module for Windows PowerShell and connect to the service
   • $cred = Get-Credential
   • Connect-MsolService -Credential $cred
2. Get-MsolAccountSku | Format-Table AccountSkuId, SkuPartNumber
   • The second column in this list is referenced in the next command as [SkuPartNumber]
3. $ServicePlans = Get-MsolAccountSku | Where {$_.SkuPartNumber -eq "[SkuPartNumber]"}
4. $ServicePlans.ServiceStatus
   • This returns all the service plans
5. $MyO365Sku = New-MsolLicenseOptions -AccountSkuId [tenantname:AccountSkuId] -DisabledPlans Comma_Seperated_List_From_ServicePlan_Output

Secondly you need to assign the licence to the user(s):

1. Set-MsolUser -UserPrincipalName user@domain.com -UsageLocation GB
2. Set-MsolUserLicense -UserPrincipalName user@domain.com -AddLicenses [tenantname:AccountSkuId] -LicenseOptions $MyO365Sku
3. Repeat for any other licences you want to apply for other users or other licence options you want to apply to this user.

For reference, the SkuPartNumber's that we discovered are:
Inside ENTERPRISEPACK Sku:

• OFFICESUBSCRIPTION (this is Office Professional Plus)
• MCOSTANDARD (this is Lync)
• SHAREPOINTWAC (this is Office Web Apps)
• SHAREPOINTENTERPRISE
• EXCHANGE_S_ENTERPRISE

Inside DESKLESSWOFFPACK Sku:

• SHAREPOINTWAC
• SHAREPOINTDESKLESS
• EXCHANGE_S_DESKLESS

Inside EXCHANGEARCHIVE Sku

• EXCHANGE_S_ARCHIVE

With thanks to Donte Henry (Avanade) and Tim Heeney (Microsoft). Discovered during the Office 365 MCM Class for Exchange 2010 MCM's.