Ensure that the SBS has ample resources The Small Business Server combines many important server roles on one computer (Active Directory Domain Controller, Exchange Server, MS SQL Server, SharePoint server, IIS, WSUS, and so on). Shortages of memory, processing power, and disk space can be common if the server is not configured and maintained well. A lack of resources has the potential to affect SMSMSE.
Use Microsoft's SBS Best Practices Analyzer to ensure the server is in good health Underlying issues such as low resources, old driver versions, and network trouble will have an effect on SMSMSE and MS Exchange. Microsoft has made a tool freely available which can analyze a Small Business Server and highlight any such issues. Symantec Technical Support recommends that these tools be run periodically and that server administrators act upon any errors, warnings, or recommendations.