There are many links that I find myself going to over and over again for different elements of Office 365 and Azure

Blogs

Technology	URL
Office 365	https://blogs.office.com
Intune	https://blogs.technet.microsoft.com/microsoftintune/
Azure	https://azure.microsoft.com/en-us/blog/

Roadmap

For details of the developments that are in progress and being rolled out

Technology	URL
Office 365	https://roadmap.office.com
Cloud Platform	https://www.microsoft.com/en-us/server-cloud/roadmap/

 

URLs and IPs

Any client that needs Office 365 will ask sooner or later what they need to do to allow, or in some cases block, access.

Technology	URL
Office 365	https://support.office.com/en-us/article/Office-365-URLs-and-IP-address-ranges-8548a211-3fe7-47cb-abb1-355ea5aa88a2
InTune	https://docs.microsoft.com/en-gb/intune/get-started/network-infrastructure-requirements-for-microsoft-intune

 

Often, when dealing firewalls expect an IP range when opening access and the CIDR format that Microsoft provides isn’t compatible.  If this is the case, then a tool such as http://www.ipaddressguide.com/cidr can be perfect for converting CIDR to IP address ranges.

Office 365 Search

REST APIs

SharePoint Search REST API overview – https://msdn.microsoft.com/en-us/library/office/jj163876.aspx

Query Refinement in SharePoint 2013 – https://msdn.microsoft.com/en-us/library/office/ff394639.aspx