One of the most common questions customers ask about Office 365 is the difference between the P (Small Business and Professional) and the E (Enterprise licenses). Hopefully, this will help.
1. P Plans cannot be upgraded to E Plans
Probably the most important thing to consider when selecting between P and E Plans. Once you move onto a P Plan the only way to change to another plan is to migrate the data out, cancel the P plan, buy a new plan and migrate the data back.
2. P Plans do not support advanced Exchange features
The P Plan does not support the following advanced Exchange features:
– Unlimited inboxes
– Legal hold
3. P Plans are aimed at no more than 25 users
The absolute maximum limit for P Plans is 50 users but it is recommended that they don’t exceed 25 users.
4. Plans do not support all the advanced SharePoint features
P Plans do support the following advanced SharePoint features:
– Office Web Apps read/write
– Access Services (for databases in the cloud)
P Plans do not support the following advanced SharePoint features:
– Form services
– Visio Services
– Excel services
– Encrypted traffic for SharePoint (i.e. all sites are http:// not https://)
– Multiple intranet sites (they have a single site collection only).
– Addition of extra space for SharePoint sites. P Plans only have 10GB to start with + 500MB per user max.
– My site
– Unlimited external (non-Office 365 users). P Plan is limited to 50.
5. P Plans do not support identity synchronization
P Plans do not provide the ability to link your local user list (Active Directory) to Office 365. Thus, with P Plans you will always have two distinct sets of users, on premises and one in Office 365 that both require maintenance. This typically means with P Plans you need to main 2 sets of user logins and passwords.
6. P Plans require DNS moved to Office365
DNS is basically a record of where information about Internet servers are located (i.e. web servers, email servers). By default, the P Plans require that these records be moved to and managed by Office 365.
7. P Plans only have community support (outside Australia)
For regions outside Australia P plans have not support apart form that found on the Internet. In Australia however P Plans are supported by Telstra via phone 24/7.
8. P Plans do not allow the management of mail security
Exchange Online as part of Office 365 is protected by Microsoft Forefront Protection for Exchange (FOPE). P Plans do not permit the administration or customization of this. Thus, with P Plans you are unable to set custom email white and black lists, block IP, etc.
9. P Plans have lower email receipt limits – limits removed Feb 2012. see – http://supportweb.ciaops.net.au/blog/archive/2012/02/09/recipient-rate-for-office-365-p-plans-goes-up.aspx
have a reduced amount of email that can be sent per day per user. Limits can be found at: with P Plans the limit is basically 500 1500* mail recipients per day. Now *1500 as of the end of December 2011.
10. P plans are limited to 50 online meeting participants
P Plans have access the Lync client software but are limited to having only 50 participants maximum attend any meeting. Thus, if you are planning to do webcasts to large audience 50 will be the limit with a P Plan.
Hope that makes things a little cleare.