The username you are using to logon to SharePoint Online is not the real domain username that you should use. To find out the real user name:

1. Enter SharePoint Online

2.  “Site Actions” -> “Site Settings”

3. On the left, in “Users and Permissions” -> “People and Groups”

4. Select the desired user

5. The “true” user name is under “Account”, under the format [domain]\[username]

Another approach is to use a constraint on an existing field (a new feature in SPListConstraints): regular expression validation. When loading a new item, or changing item metadata, the metadata is validated with the regular expression the user (administrator) selected.

Here’s how the setting of the field format validation looks like in the SPListConstraints (version 1.0b1 and above):

SPElements Picture Gallery works with Picture Library and displays clickable thumbnails gallery from the pictures in the library, which can either: (a) create lightbox-like popup, (b) open the image in the browser or (c) open the image item. All configurable by the SharePoint webpart administrator.

SPListConstraint just got a new feature “Data Validation Contraint” which do just that – enforce relation between the values of two columns. The feature allows more than a single constraint set on a list so there’s not problem adding few rules (A <= B, B > C, etc..). The new feature is configured using the SPListConstraint settings page:

• SPElements Mini Calendar Web Part – a mini calendar web part that allows adding a calendar in any existing page without taking all the space like SharePoint’s built-in calendar.
• SPElements Color Calendar Web Part – It’s based on SharePoint’s built-in calendar but adds colors.

Both web parts support coloring & multiple calendar sources. You can select several different calendar lists to show in a single web part and give a different color for each source list (or use multiple views from the same calendar list and color each view differently). Since the mini calendar is very small only one color is selected for each date in the case there are few events with different coloring in the same day.

SPElements Mini Calendar is a small, resizable web part. When pointing on a specific date all the events in that date are displayed in a tooltip box. Clicking on an event in the opened box will open the view form of the item. Smallest recommended size is 180px*180px, although it’s possible to resize to even smaller size but scroll bars might appear on some browsers (Firefox).

SPElements Color Calendar integrates nicely into SharePoint calendar look and feel with a gradient filling of the events as shown in the image to the right.

After looking a bit I’ve decided to try and write something quickly, and so came SPElements Remote Explorer for SharePoint – a simple tree navigation tool thats uses SharePoint standard web services to browse SharePoint internals. As a side effect, it can also browse SharePoint Live since there’s no server side installation.

The privileges needed from the user are minimal (read access & remote interfaces access) with anyone with standard role as contributor or above got them (you can even add it to the ‘Read’ role). You can open the tree directly in a specific site so there’s no need to have the permission for the entire farm, just for a specific site.

Anyhow I found this very good slide show JavaScript, and wrote a small wrapper web part around it (SPSlideShow). I think the end result is as good as good any Flash/SilverLight web parts, if not better.

p.s. use the forum for bug reports.

Well, there are some full size calendar web parts for SharePoint, which include printing, however that wasn’t the request. He just wanted to print his current calendar.

Making long story short – no existing solution was found, thus came SPPrint, a printing feature for SharePoint, to print SharePoint calendars. As a side effect it can also print any given list (an idea taken from Ishai’s printing feature)

Update: Please leave comments in the community forum. There are too many comments to follow properly here.