Query on saving all Outlook files

[penci...@gmail.com]

With the Telstra change about to happen, how do I ensure that I've backed up my Outlook email, addresses and calendar?  I have tried doing this with the calendar, but just get two reminders of everything now.  I will be staying with Outlook and not going to Telstra's preferred email arrangements of online.  My computer is an Asus, 64bit Win 10, laptop.  I do have the settings to use when the change comes (thank you so much), but am not sure whether these should be entered before the date of change that Telstra has given me (12 am EST 16th September), or afterwards. I'm a bit nervous about losing data, of which I have a great deal in Outlook, and don't really understand the whole process as you can see. 

[John A]

Hi.  What is your first name? I don't have a record of your email address on our membership file.

To your query...

Assuming that you have Office 2013 or later, I would suggest moving the emails that you want to keep to a new Outlook Data File (.pst) as described here
https://support.office.com/en-us/article/Create-an-Outlook-Data-File-pst-to-save-your-information-24e6eafe-5700-4994-99e6-1783f556bbd2 

Then you can open this file in Outlook to see your messages, regardless of your Telstra account.  I would also suggest making a backup of this new PST file on a USB disk since it is held locally on your hard disk in your Documents > Outlook Files folder, not in the cloud.

Then I suggest that you keep adding messages that you want to keep to this new PST file until you get switched over to the new Telstra mail

Meanwhile, set up a new account in Outlook with the new Telstra Mail settings so it is ready to operate when the changeover occurs (unfortunately you won't be able to test it until that time). 

When you are satisfied that the new account is operating after the changeover, and you have saved messages from the old account to the above PST file, then you can delete the old account.

Have fun
John