Office 365 gotcha No. 9: Assuming SharePoint Online is as robust as SharePoint Server
Given the robustness of Exchange Online compared with on-premises Exchange, you might be led to believe that SharePoint Online and Lync Online offer a feature set in line with their on-premises counterparts. In the main, you won't be disappointed by the differences. But don't assume you'll get everything when you make the switch. Take claims-based authentication, for example; if you rely on that feature with SharePoint Server, you'll find it isn't supported by any flavor of SharePoint Online. So be sure to note all the features you depend on, whether they are supported, and which plans support them.
I was personally surprised to see that email-enabled lists and libraries are not supported, but site mailboxes are supported. Remote BLOB storage is another feature that is not supported, though that makes sense, given the lack of local storage.
Some features won't be missed, depending on your plan and needs. But if you work with SharePoint and have a good amount of data held within it, you might want to consider a third-party solution if you cannot migrate the data manually. Microsoft doesn't provide any kind of SharePoint migration tool, but does offer two manual SharePoint migration tips:
One way to manually move content to SharePoint Online is by connecting the SharePoint Library to SharePoint Workspace. You can then upload content to SharePoint Workspace and it will automatically synchronize these files to SharePoint Online. Another manual approach is to use the capability of SharePoint to upload multiple files. This will allow you to upload batches of files at once.
Office 365 gotcha No. 10: Thinking Lync Online means hassle-free full telephony
The complexity of on-premises Lync setup is daunting. For most admins, setting up Lync means going as far as getting it up and running to provide IM and presence information for your users. Those who switch to full telephony through Lync Server on-premise are very likely to have brought in consultants to help.
With Office 365, you might be tempted to think you get all the benefits of Lync without the on-premises setup hell. That's true, to a degree. Within your Lync network you'll have IM and presence, along with videoconferencing, Lync-to-Lync calls, and so on; however, Lync Online, by itself, does not offer true VoIP telephony. It can connect to an existing system (PBX/IP-PBX), but only using on-premises equipment; be sure to plan accordingly. Note: Microsoft is planning on allowing for PSTN connectivity according to its road map, but this is still not a replacement for your existing system or solution, simply a means of connecting your Lync account with a PSTN number.
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