Administration roles in Office 365
http://technet.microsoft.com/en-us/library/hh852528.aspx
Prepare for directory synchronization
http://msdn.microsoft.com/en-us/library/azure/jj151831.aspx
How Active Directory Functional Levels Work
http://technet.microsoft.com/en-us/library/cc739548(v=WS.10).aspx
Identifying Your Functional Level Upgrade
http://technet.microsoft.com/en-us/library/cc754209(v=WS.10).aspx
Microsoft Office 365: Make a Smooth Move to the Cloud
http://technet.microsoft.com/en-us/magazine/gg675925.aspx
Moving to Office 365 has never been easier!
https://office365.useractivation.com/
DirSync: List of attributes that are synced by the Azure Active Directory Sync Tool
http://social.technet.microsoft.com/wiki/contents/articles/19901.dirsync-list-of-attributes-that-are-synced-by-the-azure-active-directory-sync-tool.aspx
Office 365 DirSync Filtering
http://msexchangeguru.com/2012/08/10/office-365-2/
Get-MsolUser (ReturnDeletedUsers, UnlicensedUsers)
http://technet.microsoft.com/en-us/library/dn194133.aspx
Getting all Licensed Office 365 users with PowerShell
http://adminsnotes.blogspot.in/2013/09/getting-all-licensed-office-365-users.html
Office 365 – User Account Management
http://technet.microsoft.com/en-us/library/office-365-user-account-management.aspx
Assign or remove licenses, or view a list of unlicensed users
https://support.office.com/en-US/Article/Assign-or-remove-licenses-or-view-a-list-of-unlicensed-users-997596b5-4173-4627-b915-36abac6786dc?ui=en-US&rs=en-US&ad=US
What happens when SharePoint Online subscription expires
http://blogs.technet.com/b/vedant/archive/2009/10/21/what-happens-when-sharepoint-online-subscription-expires.aspx
Checklist: Deploy your federation server farm on Windows Server 2012 R2
http://technet.microsoft.com/en-us/library/dn528856.aspx
Install the Federation Service Proxy Role Service
http://technet.microsoft.com/en-us/library/dd807096.aspx
AD FS Step-by-Step Guide
http://technet.microsoft.com/en-us/library/cc731443(v=WS.10).aspx
configure DirSync and SSO with ADFS and Office 365
https://onedrive.live.com/view.aspx?resid=8D22925062E717B6!328&app=PowerPoint&authkey=!AHUCydKhR9wk7GI
Find your domain registrar or DNS hosting provider (TXT, MX and CNAME, SRV)
https://support.office.com/en-us/article/Find-your-domain-registrar-or-DNS-hosting-provider-b5b633ba-1e56-4a98-8ff5-2acaac63a5c8
MOSDAL and Office 365 Service Health Page
http://www.microsoft.com/en-us/download/details.aspx?id=30716
You can’t connect to Lync Online, or certain features don’t work, because an on-premises firewall blocks the connection
http://support.microsoft.com/kb/2409256
http://community.office365.com/en-us/f/148/t/188592.aspx
Office 365 Service Continuity
http://technet.microsoft.com/en-us/library/office-365-service-continuity.aspx
Convert-MsolDomainToFederated
How to troubleshoot deleted user accounts in Office 365
http://support.microsoft.com/kb/2619308
Exchange admin center in Exchange Online
http://technet.microsoft.com/en-us/library/jj200743%28v=exchg.150%29.aspx
Permissions in Exchange Online
http://technet.microsoft.com/en-us/library/jj200692%28v=exchg.150%29.aspx
MFA for Office 365 and MFA for Azure
http://blogs.technet.com/b/ad/archive/2014/02/11/mfa-for-office-365-and-mfa-for-azure.aspx
Plan for Internet bandwidth usage for Office 365
http://technet.microsoft.com/en-us/library/hh852542.aspx
Delete or Restore User Mailboxes in Exchange Online
http://technet.microsoft.com/en-us/library/dn186233(v=exchg.150).aspx
Getting started with Windows Azure Multi-Factor Authentication
http://blogs.technet.com/b/ad/archive/2013/10/10/getting-started-with-windows-azure-multifactor-authentication.aspx
Under the hood tour on Multi-Factor Authentication in ADFS – Part 1: Policy
http://blogs.msdn.com/b/ramical/archive/2014/01/30/under-the-hood-tour-on-multi-factor-authentication-in-ad-fs-part-1-policy.aspx
Under the hood tour on Multi-Factor Authentication in ADFS – Part 2: MFA aware Relying Parties
http://blogs.msdn.com/b/ramical/archive/2014/02/18/under-the-hood-tour-on-multi-factor-authentication-in-ad-fs-part-2-mfa-aware-relying-parties.aspx
Assign or remove licenses, or view a list of unlicensed users
https://support.office.com/en-ca/article/Assign-or-remove-licenses-or-view-a-list-of-unlicensed-users-997596b5-4173-4627-b915-36abac6786dc?ui=en-US&rs=en-CA&ad=CA
Jerry Yasir's Blog 
Reblogged this on Rami's Life Blog.