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The following steps describe the actions needed in order to connect the Calendar Plus web part to a SharePoint Custom List:
When creating your SharePoint Custom List, be sure to include the following columns (or equivalent type columns):
After creating the SharePoint Custom List, open the Calendar Plus tool pane in the "SharePoint Calendar Lists" section.
In the first textbox (titled "SharePoint site URL"), type the custom list's full URL, or use the tokens as described in the "SharePoint Calendar Lists" section of this document.
Then, click the "Load…" button next to the textbox. The browser should refresh the page.
Next, use the drop down box to select the SharePoint Calendar List you created.
Again, the browser should refresh itself.
After the browser loads the page again, you should see the selected list in the drop down box.
Select the view of the SharePoint Custom List you wish to use and other settings (like background color and legend alias).
Next, only if you created your SharePoint Custom List with different column names than the ones used in Stage 1 (the default SharePoint Calendar List names) then expand the "Custom list field names definition" and update the relevant fields' names manually.
When you are ready to add the SharePoint Custom List to the Calendar Plus, click the "Add" button, located at the bottom of the "SharePoint Calendar Lists" tool pane section.
Note: This stage is very important. Do not click the "Apply" button or the "OK" button before this stage.
After clicking the "Add" button, the browser should refresh itself and then, if no errors exist, you should be able to see the list you selected inside the text box located underneath the "Add" button.
If the list is not displayed in that box then some error has occurred and the Calendar Plus will not display your list.
When you see the list of your choice in the text box mentioned in Stage 9, you can click the "OK" button (or "Apply" button) to see the SharePoint Custom List's events in the Calendar Plus web part.
Yes. To configure this feature go to the “Adding new item” section and check “Allow adding new items”. Under his checkbox you will find all the sources you configured to be presented in the Web part, check the sources which you want to allow adding new items to.
You can achieve this by using Exchange Web Access. Before you try to connect calendars from Exchange to KWizCom Calendar Web Part please check that the Outlook Web Access service is running on your exchange server and that you can connect to Exchange's Calendar via Internet Explorer.
Check that your SharePoint user has permissions to read the specific Calendar.
To connect a Personal Calendar to Calendar Plus Web Part modify Outlook Web Access (OWA) section.
Please check that you filled OWA configurations like the example:

If you are experiencing problems and do not have an error indication please change the Web Part properties to allow the Web Part to display errors when they occur. In the "Calendar General Settings" section check the "Show Errors" property.
Calendar Plus data retrieval service authenticates to OWA using same user credentials that are used to log-in to the SharePoint server.
This should work only if both the SharePoint server and the Exchange server are on the same windows domain (or exist on trusted domains).
In any other configuration the SharePoint might have a problem impersonating as the current user and will not be able to retrieve the data for the view.
Modify OWA section in the Modify Shared Web Part menu. Fill the "Use default credentials to load Shared Calendars" checkbox and fill the credential details.
Enter the "Edit Page" mode in the page that contains the Calendar Plus Web Part. Press the "Edit" button on the web part and enter the "Outlook Web Access user credentials" dialog:

Fill the details and press the "Save" button. Refresh the page.
Set permissions for Calendar from the Exchange System Manager or from Outlook.
After you choose the calendar from the list you must press the “Add” button to add it, then you will see your Calendar is added to the Calendar lists:

Possibly only the Administrator has permissions to this calendar or you made an error when you filled the User Credentials details.
You can try one of the following steps to fix the issue:
Please try to remove the old calendar configurations from the calendars list and add your Calendar again but in the view field please leave the "Default view" value.
Please try to remove the old calendar configurations from the calendars list and add your Calendar again but in the view field please leave the "Default view" value.
No, KWizCom Calendar Plus only supports SharePoint Calendars that exist on the same server.
Our calendar only present events from its configured source, meaning – you can only add events in the source calendar and our product will present it.
It’s a “presentation” solution, not a “data entry” solution.
Some tip:
You can create a new Links list and add it as web part on the page with KWizCom Calendar Plus. Create a link to "Calendar New Item" page like this:

You can also add this link to Quick Launch.
This error occurs if the Calendar Plus data retrieval service cannot reach the Exchange URL. Please test the entered URL and verify that it is reachable.
Calendar Plus data retrieval service uses the timeout defined in the web part's appropriate property. This property defines how much time (seconds) the data retrieval service should wait for a data source's response. If one of the data sources is responding slowly or if there are a lot of items from that source they may be loaded partially or not loaded at all.
In that case you may want to increase the time specified to a longer period or check the reason for the delayed response of that data source.
In some cases when you use OWA in a different language than your site you may experience problems retrieving items from OWA.
There are two ways you can take to solve this problem:
Fix this problem server wide - use the web part's resource editor to edit the "calendar" key to your OWA calendar folder name.
Fix this problem for a specific Web Part - edit the calendar folder name property and insert the OWA calendar folder name.
To create a data source for a SharePoint list you have to follow next steps:
Create a Calendar list or an Event list.
Add items to the list.
Go to Calendar Plus webpart properties by opening the toolpane.
Go to "SharePoint Calendar Lists" section.
Insert the site URL where the calendar list exists into "Enter SharePoint site URL and click Load" textbox or stay with [current site] if your list on the current site.
Select the list you created from "Select a SharePoint event list" dropdown box.
Click on the "Add" button at the bottom to add the list to the "Current Lists" listbox.
Click the "Ok" or the "Apply" button to see the changes in Calendar Plus.
Calendar Plus cannot connect to Exchange 2007 if the “Require SSL” checkbox is checked in Exchange virtual directory.
CalendarPlus cannot connect to exchange 2007 if the “Require SSL” checkbox is checked in Exchange virtual directory. The checkbox is checked by default even if the website doesn’t have SSL.
To resolve the problem you have to check that “Require SSL” checkbox is unchecked:
Open IIS Manager on Exchange server
Open the properties for the Exchange virtual directory under the default website -> directory security -> Edit for Secure Communications
Uncheck “Require SSL”.
In General Settings, check the following checkboxes

In the SharePoint lists configure the tooltip fields as you wish it to be shown

No. KWizCom SharePoint Calendar Plus is a server installation.