Change the default version of PHP in the control panel is easily. There are 5 steps to change the default PHP version:
The steps as follows will tell you how to migrate contacts from 1&1 webmail to Office 365.
If you have assigned your 1&1 Mail Basic or 1&1 Mail Business mailboxes to another domain or subdomain as described in the Migrating 1&1 Mail accounts to Office 365 article, you will have to use the correspondingly-modified e-mail address for logging into 1&1 Webmail.
You need log in to your 1&1 WebMail account to export the contacts of yours.
This step is only necessary for importing the file in Outlook later.
Please refer Microsoft Office Help: Importing Contacts into Outlook
1&1 WebMail provides the full functionality of an e-mail program and lets you access your e-mail where and when you choose using any Internet browser.
In addition to your local e-mail program, 1&1 lets you read and send e-mail using any web browser. You can access your e-mail account from any Internet-connected computer.
Also, you can visit 1 and 1 Official Website to get more helps, faqs and knowledge base.
1&1 is one of the world's leading Web hosting providers. 1&1 currently offers a wide range of Web hosting products, including email solutions and high-end servers in 10 different countries including Germany, Spain, Great Britain and the United States.
1&1 introduced its distinctive approach to the US in September of 2003. Since the January 2004 launch of its complete product line in the US, 1&1 has become one of the country’s top five Web hosts. In September 2008, 1&1 opened a 55,000 square foot data center in Lenexa, Kansas.